PDF malware analysis — malicious · 0976587a71c39c73

MALICIOUS

PDF

86.9 KB Created: 2021-07-15 10:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: a025cdd771bf3a739af31a4f354264bb SHA-1: a44642c82522a59d444da670b27c7fe28e196bcb SHA-256: 0976587a71c39c731bc503dc5d1822099e3175e8aa45031993ce78fc1197cb50

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The 'SE_CLICKFIX' heuristic suggests social engineering to trick users into executing commands. ClamAV detection and ML classification further confirm its malicious nature, likely serving as a lure for a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
ClickFix social engineering attack high SE_CLICKFIX

Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/9uu2pb7q7c8rb0h8jpkopknl8e/laroxekiwenajokaxos.pdf In PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3ec4ea204---69799320286.pdfIn PDF document text
- https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/62b2eb6d62cbafd17aec6da6105fb6c2/mowegamotimiresope.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897ae3ee38d---dareje.pdfIn PDF document text
- http://sam-global.ch/files/file/sogijibatig.pdfIn PDF document text
- http://zafirkort.com/uploads/files/jozalivevifaj.pdfIn PDF document text
- https://haysalon.com/public_html/userfiles/file/gaxiropovelopos.pdfIn PDF document text
- https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/13db4c5c4b55b4501cb58db0524476ea/jubesu.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f11d622c5---80032797146.pdfIn PDF document text
- https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/8987fdfb951491f3a7c4399b6b14dd00/durolonovovofupomu.pdfIn PDF document text
- http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc7e70ad00---mezelizabul.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bce641a626---52839806676.pdfIn PDF document text
- https://asthasupermarket.com/userfiles/file/37691974007.pdfIn PDF document text
- https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3be15a6e6---dedekawudifesaruwemi.pdfIn PDF document text
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4bbcca76c41d55bb7fcc605b046f209f/43535977891.pdfIn PDF document text
- https://xn--arbeitskndigungsrecht-best-5zc.de/userfiles/file/55757205286.pdfIn PDF document text
- http://erpsamik.com/ckfinder/userfiles/files/79789865693.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/3a438867509b45c3ca0fdaf9340a333f/10185537544.pdfIn PDF document text
- http://siripanyalamphun.com/user_img/files/24313840118.pdfIn PDF document text
- https://jooli.ru/ckfinder/userfiles/files/13576988227.pdfIn PDF document text
- http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/565a2a03fd125251494ca730d029d0fb/31363475450.pdfIn PDF document text
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160804aa522743---26988009529.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a60d8234a7bd66c416f07b67c2cc4d9d/digolevasubavewefu.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/4eacce67c387b46902051c73d2ce83c3/repumisugadiga.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/0da5701a3e6437ae99cce3d9f2dd0c63/zafalovoxobijalu.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160867517c90b5---43165409095.pdfIn PDF document text
- http://a2itsolutions.com/chop/multimedia/userfiles/file/tumerivaxuzorut.pdfIn PDF document text
- http://edgewood1962.com/clients/2/2b/2b25cacec04995aba37d275b9c35b4d1/File/76723665290.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=php+get+file+listPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f020.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF020	10152 bytes
SHA-256: `1cb0db39004d02839e1108ff9f2adf0abdb3ecddc4a77992cdcf1785f6725560`
`font_01_sfnt_off000106eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106EB	17956 bytes
SHA-256: `4675f44cdd6c7347231fa3118c5c916bfd9c98beaceda7e6f28eb677762d3d4a`
`font_02_sfnt_off0001364a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1364A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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