Malicious PDF — malware analysis report

Static analysis result for SHA-256 092927eb5bde7b99…

MALICIOUS

PDF

98.7 KB Created: 2021-06-27 23:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db43605d38225e1a7dceea5f6b0e5863 SHA-1: 82f81afda922a32a080712f1d6e7da6c13cc1bfe SHA-256: 092927eb5bde7b99dd98f2362f9d465b3ffc76cedf01a0e037c69c57fcdeb9e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The presence of a link farm on disposable hosting and the use of UTM parameters further indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c83be2c844---xuxekogezuwurudedizok.pdf
    • https://arvikabc.com/images/uploadedimages/file/pemunoxuwoxanibebaluf.pdf
    • http://pensionpoint.cz/userfiles/files/92029868049.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/98454386335.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9f6491ba8---gevin.pdf
    • http://lighthouseofworship.com/clients/44803/File/gokefepemoxawopi.pdf
    • http://sllight.ru/design/img/upload/file/mivuberazaf.pdf
    • http://premium-h.info/files/files/14775805732.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/d7a8c4bf71de99ed48cffcb5bf15e1dd/masofulomipaje.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c383da399---xijidawipafewoza.pdf
    • http://broadgatecapital.com/userfiles/file/62698206312.pdf
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/s7qn2n9f03o43u0h0utv0nbij7/jojigumusifosonegojukatil.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb3ad5356d---93598944089.pdf
    • http://fine-cottage.ru/userfiles/file/31386260753.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608512be9de25---kuzaxoxudafovakibuwurisem.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/ptbm3n9p9p7rkicrkahu4j1plr/16921126514.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/d5716959ace4885493ce81ed77871192/27315495502.pdf
    • http://artside.org/data/temp/file/37409325529.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098de081afdf---41937836627.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/6e202b05551e52dafe043fbcb2768f80/davajuluzugakefim.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/73878de42ee96d94e88004fef57b2541/vuwubekitoputusanefejoga.pdf
    • http://diversecityuk.com/userfiles/file/61117983575.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b31ab41c3d8---wapala.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/f012d4b8681692d8bb592a56ba03398d/bagiwiv.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=facts+on+egyptian+civilization
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001213f.bin
7c090502502be77ec71c7b18c0d4ee5ca3ff5ec121a4165ffe56b9a54177ed19
pdf-font-stream PDF embedded font (sfnt) at offset 0x1213F 16856 bytes
font_01_sfnt_off00014cec.bin
d5bc6a0bd0dd1611a06ecebc8f64131a6156bf0e295c23b015a5757f2ea0750c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CEC 10664 bytes
font_02_sfnt_off00016595.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16595 16792 bytes