Malicious PDF — malware analysis report

Static analysis result for SHA-256 130fa2ecb0749967…

MALICIOUS

PDF

89.2 KB Created: 2021-07-06 15:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 066d5a06553209d98e192472886bde6f SHA-1: ad88680df88e972704165c77174a83090e50fa2d SHA-256: 130fa2ecb0749967fa993afb7f480919a94f849a0669ff7f78d9473294c03f69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04f572b803---bofikomofonanovi.pdf
    • http://gfb.it/upload/fck/file/23805120412.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/9grb14kooe87hl8st52a01ct6d/59354527889.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/545a6776ea168c7918fc1573525c5fcc/tefizaxi.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/286e3f70394c88b4431ddb84ea11699e/50565327920.pdf
    • http://flooroverstock.com/admin/userfiles/file/movebevojilabozuliruriv.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e353e3ae34f---72710981788.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/c7d2fc0d8e104e9c69ef7167f56ebe28/15212209701.pdf
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/54979740501.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d3e474718df---sadomu.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/d59eb1d14171ee35a7f6b16ca8a14033/kemikigazasizabapajog.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/f76a37d304e3417b720a295607e71e2b/48285155977.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/bd99e6c652b51456726c8a7ff7b3edb1/xavisinorinoxuf.pdf
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/judodage.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077075e57ca3---sedodilirab.pdf
    • http://stasta.com/userfiles/file/93226922911.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45577bb3ef9bc153e42a25ef5cbaaf2b/losarukekena.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e7eb51bc5---pevamamogevukubuxarowo.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873d4742a08---50234610931.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/g5f5lkmtj4dcm3hqn8kelo1om4/43185880457.pdf
    • http://mpti.ru/userfiles/file/80158324609.pdf
    • http://annamsaigonlaw.com/upload/files/22213011665.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/bb9a96b032ec470e9e1d258f95a96a2c/46028997655.pdf
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/kdbiirecko3sgdm08bniolirqg/15988303003.pdf
    • https://pointswestliving.com/ckfinder/userfiles/files/zoradore.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb1e082fe4---99321081909.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=all+prediction+site+for+today
    • 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_off0000f9f0.bin
f6f88c772a0c3deaf5465fb033b6026557961658c699c17a7b37706b87494859
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F0 10708 bytes
font_01_sfnt_off000112a9.bin
92a1f148044ee893e2ad9a24dd7bc0d6df146f447f5eda85322aff6d5a930963
pdf-font-stream PDF embedded font (sfnt) at offset 0x112A9 17176 bytes
font_02_sfnt_off00013f5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F5D 16792 bytes