PDF malware analysis — malicious · d6706e58ce155172

MALICIOUS

PDF

90.2 KB Created: 2021-09-04 15:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: ce21fd3ab067faf42aab9fa85e28e5e2 SHA-1: a19496ed3357040ed19119fc4e2182ee3093c6fd SHA-256: d6706e58ce155172abc9a1ddd4d7d0f8372cc3718b51f3895faa652435acc2ea

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

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
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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/352e4b5b09fb5fa3e5cc3605b4c6805e/94482871227.pdf In PDF document text
- https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/juvumixow.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/c834bff3e2152fffd9b18c2e4c0ab2f8/tikedanavofijazononajinu.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/oiq0hfjerhkuls04cs0ftum7d5/xosezekilijagado.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608567fb91c25---96964417919.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16075ead668031---zewadegapelonaxijeluja.pdfIn PDF document text
- https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/7i0dl9osouqpvds6v800iqjmu1/79731411775.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/6d90bbfdfbd78d8d305647a77b4905ae/4268799365.pdfIn PDF document text
- http://union.travel/ckfinder/userfiles/files/23117668630.pdfIn PDF document text
- http://dogwarts.ru/sites/default/files/file/93884366041.pdfIn PDF document text
- http://aquamedia.cn/ckfinder/userfiles/files/xelamiti.pdfIn PDF document text
- https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd9df256e0---2008487583.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c73c375ad---58999154610.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/5c8ab9435292cd815a976cec9da368a5/tosusomimomomurixizek.pdfIn PDF document text
- http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c269b01dd7---porigazuligupibebutuxa.pdfIn PDF document text
- https://questyme.com/userfiles/file/movub.pdfIn PDF document text
- http://madonnina.info/userfiles/files/41603136057.pdfIn PDF document text
- http://ageddfjtj.pretty-match.com/upload/files/33087388188.pdfIn PDF document text
- http://phutungvespaco.com/luutru/files/63139872351.pdfIn PDF document text
- https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/401c88ac30374c4a03c7d925793b38be/11482841913.pdfIn PDF document text
- https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/39a9bdf4de10e42b626c9cb12acae6bc/jogelatobo.pdfIn PDF document text
- http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607d07271c5d4---4406002090.pdfIn PDF document text
- https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/sjhp1fofac8fr0qmrf60r322f0/58002831465.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=rate+of+decomposition+of+calcium+carbonate+lab+pdfPDF 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_off0000fac7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFAC7	18112 bytes
SHA-256: `ad9646aa216586f999944aefd0087a42dcf256a716b385e254088a09f1fd28c2`
`font_01_sfnt_off00012997.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12997	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000141ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141AE	11064 bytes
SHA-256: `2d4ac5ce4b2eeda4d3cb12111ff6e72db62dd0ef39a33392b16428473b36d519`

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