PDF malware analysis — malicious · 16eb9c5057cb57bd

MALICIOUS

PDF

76.9 KB Created: 2021-07-20 23:21:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: f4bd8ba506c2e77ad56782cfaae6b668 SHA-1: f52a6dbf146b32a14687adbe197f2405ea62b493 SHA-256: 16eb9c5057cb57bd064608560b195c20b1145feb764469e158fb42c4291d4c5b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Several heuristics indicate the PDF acts as a link farm, directing users to compromised websites, including one hosted on a WordPress upload storage. The embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

Heuristics 6

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 http://altinay-law.com/images/file/xilin.pdf In PDF document text
- http://aitrans.cn/UploadFile/file/F1202106100805254591.pdfIn PDF document text
- http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160777a4b09168---navadanapobo.pdfIn PDF document text
- https://badrivishal.com/media/jipazezigavezerim.pdfIn PDF document text
- http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f39b0992fa---61274396816.pdfIn PDF document text
- http://adamant54.ru/userfiles/files/valekudoxu.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec519c8c595---gukidisaxa.pdfIn PDF document text
- http://aire-limpio.com/img/editor/file/1317206474.pdfIn PDF document text
- http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0899a771e---vinudurerutemujizaxi.pdfIn PDF document text
- https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c559cb9ff78---nudefogirigexotebekevatik.pdfIn PDF document text
- http://cezanart.com/userfiles/file/wenililom.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/44ea7b0cdb86b6ee57b2cc83c624ee52/16820495763.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e21641812---xopivefapumu.pdfIn PDF document text
- https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/e2pqghvh512qc8t3vdpj98f582/fewaj.pdfIn PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/2746487e04d742f72afd6f34984597b5/80594662623.pdfIn PDF document text
- http://fincasotilloviejo.es/files/sotillo/_repo/file/girozutuxekop.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/69919f6d05c68c4805aa97343305b000/55778279266.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bfbba37dd---zosarad.pdfIn PDF document text
- http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02a7890b25---83676549092.pdfIn PDF document text
- https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/etc3fskl7qbqsecddiffpqp4l1/juxavosusi.pdfIn PDF document text
- http://m2m2design.com/userfiles/2325292281.pdfIn PDF document text
- http://aaaexpressheating.com/userfiles/file/44029482068.pdfIn PDF document text
- http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/mabolorojebivujud.pdfIn PDF document text
- http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd38e677c3---66418296970.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/099574cde015ba85a25d6f740436a08a/42982759655.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/260a4f95b6b9af3fd936c4883fc1e40d/gisuw.pdfIn PDF document text
- http://alfadent-volg.ru/images_uploads/files/40651350051.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=equation+of+a+line+passing+through+a+point+and+parallel+to+a+vectorPDF 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_off0000c6be.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6BE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ded5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDED5	11192 bytes
SHA-256: `9db2a03fec7c83013a94edbb1682d844a06305d4b43fab0d698c694dd4a3aba7`
`font_02_sfnt_off0000f876.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF876	17188 bytes
SHA-256: `b770e7a62be45e8bdee36b083cbed8ffb17e3c834d25c30eaf1354b9eed1cd6c`

Open this report in the interactive analyzer, or submit your own file for analysis.