PDF malware analysis — malicious · d120cb65675be0d9

MALICIOUS

PDF

87.1 KB Created: 2021-06-28 05:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 7fc05da3f307da0226a2a4b3ad2470da SHA-1: e1399642a955632d36ea0f3a5e2e7d5637f1e758 SHA-256: d120cb65675be0d96d8ee34e9e301d73375566c8a5487cbbd15435c5c416d5f9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm. Several extracted URLs point to compromised CMS upload directories, suggesting a distribution point for malicious content. Although no scripts were directly extracted, the PDF structure and link farm behavior are indicative of a phishing or malware delivery attempt, likely initiated via spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/72rgfrs7t3noad26p0cgiuqoc3/30497239494.pdf In PDF document text
- http://ceomit.com/fckupload/file/julobufoxajajitima.pdfIn PDF document text
- http://babywagen24.de/userfiles/file/reduseju.pdfIn PDF document text
- https://gea99.com/ckfinder/userfiles/files/gurevosesukomip.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769a67e7da0---joroko.pdfIn PDF document text
- https://audit-advisers.com/userfiles/file/ratosiba.pdfIn PDF document text
- http://clinicaveterinariabilancino.it/userfiles/files/77248829893.pdfIn PDF document text
- https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f728b6365---dipef.pdfIn PDF document text
- https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895eb520e25---25394860217.pdfIn PDF document text
- https://dagvandearchitectuur.be/_files/file/taxukarotek.pdfIn PDF document text
- https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/a0f28ed62f01e846b1f5fee2bb3838b0/98098540699.pdfIn PDF document text
- http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607725e5334a7---kekoxizofivoja.pdfIn PDF document text
- http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/32438748041.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c533e093cf8---sunegexagit.pdfIn PDF document text
- http://alibabashipping.com/userfiles/file/64503398000.pdfIn PDF document text
- http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e7c5ca486f7c9ac8242326b4b868ed35/24393940770.pdfIn PDF document text
- https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160796e74f3b80---mijunupukiwi.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/aca422293b0059a7921fa4f6332204e7/vanifosina.pdfIn PDF document text
- https://dienlanhhonganh.com/images/pic/file/fozekevi.pdfIn PDF document text
- https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/26acd1191b6d9b3284b7e3d6395130b0/69329105433.pdfIn PDF document text
- http://zonweringnederland.com/ckfinder/userfiles/files/jidemaporebopinog.pdfIn PDF document text
- http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe188c94f2---73563068948.pdfIn PDF document text
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c4901ce50---disurexejakoxevijulap.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/d6530d1f50494c91f6416d7be64c130c/lizesogelox.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=factors+affecting+business+growth+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_off0000f246.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF246	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010a58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10A58	16572 bytes
SHA-256: `6489ce6e6e49d60ed7be5d29fe834aba125ffd9d4350957889ad4e634ea6959b`
`font_02_sfnt_off0001357d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1357D	11156 bytes
SHA-256: `5c00044168aec6b3091b9199b2544fd744f9a9bcf198bc055e31b349d37d3b77`

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