Malicious PDF — malware analysis report

Static analysis result for SHA-256 268132d7ab2ebcf3…

MALICIOUS

PDF

74.9 KB Created: 2021-09-03 22:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7a41359c60e60638c5f15af81c9b1d8b SHA-1: 45948db521d02a402cc05e8508754f8ff474dc29 SHA-256: 268132d7ab2ebcf3efb949ca603e643e94febb4fd4c8f157608ceda5496d7487
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://bagiez.com/userfiles/file/fezugupadabe.pdf In PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/8u0mkrhaadpti2tqoutrkafc75/52053852759.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/85332963003.pdfIn PDF document text
    • http://hrudolf.com/userfiles/purisarakuwudugufuzivodo.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffd0a03823a---likepakifabofitewetamox.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/7a0b3c9a597cb999dd17180db12c8eaa/14129265955.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/e5101699b046c2a75ef50ffcd5df153e/96117153676.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/wonufimibijajotukejezu.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111e39e55633---4965729917.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/10523359237.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc91869d3ae---2174779507.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/rexopogogevavave.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/3419e4ba45bf6fa5d731e6aab89bb5d7/wotupalibajumo.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/1bc250671b3f0e38503b3757b9c38a03/radepabejowuge.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/e8c1d0fe44f6eb933e916a0be6248685/rojunoxinu.pdfIn PDF document text
    • http://erex.hu/upload/file/fopetevenavotame.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092dac3b4cfc---16075477520.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/nupakerofofa.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/13698432178.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202105310924233788.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8676dae90---vowoledamo.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/51066662522.pdfIn PDF document text
    • http://slphs66.com/clients/e/e6/e62fa13cff665df70d7481f632b33819/File/98407249998.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ef0d488c6---fudumipoti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=integral+calculus+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.

FilenameKindSourceSize
font_00_sfnt_off0000c312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC312 16440 bytes
SHA-256: 2c3145cd3f58116c27990280630b39e0538cefd38a29826d9a3aabf1e668ffde
font_01_sfnt_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 10636 bytes
SHA-256: edc69d02fb8d6b1d668ac3645578c231438a5386620ec67a22d48a9d1b73c610
font_02_sfnt_off000105b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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