Malicious PDF — malware analysis report

Static analysis result for SHA-256 79eabcf8110f9298…

MALICIOUS

PDF

89.3 KB Created: 2021-06-28 14:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b22ef9a9f06fdd1666ab4b402b92cd3b SHA-1: c5fc2cad24c5c1a88a46e7ff4576d7a18f834d4f SHA-256: 79eabcf8110f9298ca7f1a57a254f732dd3256b9d79ea7620caa007d1fc44cac
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and flagged by an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, indicative of an advance-fee scam lure. The document's structure and embedded links suggest it is designed to trick users into downloading further malicious content, likely a payload, by posing as a prize or delivery notification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d87c9deb80---57325256879.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/tokulonivujojilisajerib.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/43343997421.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608687c647326---32949842346.pdf
    • https://bookatowncar.com/userfiles/file/xisijabamalizevuw.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c267d0b053a---kixofarewememakapaxodusif.pdf
    • http://eperon-kochersberg.com/img_db/xelemesu.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160713307f18c0---35634759564.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609e84065ac63---48119496663.pdf
    • http://salonorganica.ru/upload/files/lojisimiribo.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/ec2d398ef6bbe38ac37fda3bdc55bc00/84537650927.pdf
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a65150b7557---79944286439.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160be7b2b4bf1c---73973417405.pdf
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/24221505207.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d6db3b298---xusugogaguzemugutipag.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072cc3925fbc---kiwedutevozejudigexi.pdf
    • http://allg-gyn.ch/userfiles/file/29315006978.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/8f50c78ae875668476e96c83fe8fba5d/jaravevivusuzetoki.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/9d53385a2b3556098dc597c3190462bc/nujoterusodokasep.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebfcecfcb0---33308987699.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160733cc9cbeca---gopifelenujivux.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/kopibi.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/v1m1imjuhbt53tpfjm5urlcm9q/somiwedijalun.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b217f0e8d9---84797317213.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c083ecd17be---fipopawawusukok.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=biology+campbell+11th+edition+free
    • 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_off0000f8f5.bin
380da062d9e3bacc6ebd5b87ed9e6dbdfcdf2ca1d120a943d68942cf0a850d24
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F5 17148 bytes
font_01_sfnt_off000125bd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125BD 16792 bytes
font_02_sfnt_off00013dd4.bin
9eac410e9dea12717ea9c17cf89be5139b932d4e6925c9e3fa23dbf9b2ebdc49
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DD4 11256 bytes