Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac70c6b84383fc2…

MALICIOUS

PDF

88.2 KB Created: 2021-07-04 00:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 101e44122e5921f1fa8c52ca061fce0b SHA-1: 4b6ff3ed3548fabc7f3c8c60b94a9d7917f712a2 SHA-256: bac70c6b84383fc2cf6155a51021ec8acf0f292c24eef68fd22b205d0dde950f
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML models and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The document's structure and heuristic firings strongly indicate a phishing lure related to lotteries or prizes, requiring users to provide parcel delivery details.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a71cea68116---38404388459.pdf
    • https://machnik.net/ckfinder/userfiles/files/62107483467.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/363d13faa20cd9b35f14730274dac212/vafugubutarexuzojenuf.pdf
    • https://abyway.lv/images/ck_images/files/tasifowefojozuwinope.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/98eec5c8c1c875878a0db68db278689e/1421080918.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9049d7de9---82031075669.pdf
    • https://emmaushuis.org/pages/26983408284.pdf
    • http://theemasternetworker.com/ckfinder/userfiles/files/2752783608.pdf
    • http://www.awakohchang.com/image/upload/File/oxanefaf.pdf
    • http://ipmarketing.net/userfiles/file/42627046932.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/36186511014.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/72238881544.pdf
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088e50aabfc6---18685911285.pdf
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/73e27505edc829219c8b648a8bf41557/67161056824.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f9fb78ec795134fca40b8f2a21d6bf91/18864790179.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/b56196d74e27f51d7b70f0d59d323b9c/51804608904.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/85a3b2d18263018476383cbf214ed993/62836511129.pdf
    • http://jrmhandling.nl/upload/file/48813136850.pdf
    • http://atek-ent.com/upload/file/firajimap.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73838bd82c---jikapi.pdf
    • http://sladkiy-ostrov.ru/userfiles/files/73389502762.pdf
    • https://anmimar.com/royal/userfiles/file/42482553364.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073535faa1f2---kanidi.pdf
    • http://dynamic1984.com/user_file/file/jerebuvototomima.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=kevin+spacey+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_off0000f495.bin
7880ca09628668d65b9531487b3154c444aa53c74aedc480dfe1f7c1feb8ccf5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 10532 bytes
font_01_sfnt_off00010cc0.bin
57858c922aa9daeddefc401aaaf8ecb9b78664b9928bd51f96d826474098d501
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 17812 bytes
font_02_sfnt_off00013b6a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6A 16792 bytes