Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3866a2dcd45885e…

MALICIOUS

PDF

83.6 KB Created: 2021-05-13 00:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1364a8e8d046da6671589e4b75112f9c SHA-1: d56e20ab3f02117f0e8f09a6c397dd9a7d0069a1 SHA-256: f3866a2dcd45885e65962f89e8376bc6f2f14f2e851b22c0a01bcddb373a0b30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, a common tactic for phishing or SEO spam. The heuristic PDF_SEO_LINK_FARM indicates a large number of links, and one specific URL points to a potentially malicious domain. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/strik?utm_term=can+i+drive+with+expired+tags+during+covid+19 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495055/normal_60170279849dc.pdfIn PDF document text
    • https://tufakuxumiwe.weebly.com/uploads/1/3/1/4/131454237/pikugo-fajidedotugolu-pivejozor-bixal.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/bebc39.pdfIn PDF document text
    • https://naleletilasimoz.weebly.com/uploads/1/3/0/9/130969891/bimaxobegegu-zisukorinefu.pdfIn PDF document text
    • https://suzavopuwo.weebly.com/uploads/1/3/4/6/134686694/kizapomaxemekoj_zamow_serekikejalul_sevizolunu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413865/normal_5ff4cebcb2e09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422918/normal_5fc990702ec0b.pdfIn PDF document text
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/4580516.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitirew/fuzotug.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/chrome_75_mac_os.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/hp_laserjet_1020_plus_printer_drivers_for_windows_7_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d41ea83-e7f7-422a-841b-0ac1d1147523/53815530832.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/gipavaluvagaruvidagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b852f62a-6808-45ac-9418-97ad8f75c08d/57383599719.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/somumar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331a9ee7-06a5-45f3-bb02-fbb2d218a789/lixexorevegozofinat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4ddfa4-d90f-42ed-8e44-9f1b0b362de9/kitchen_aid_stand_mixer_black_friday_best_buy.pdfIn PDF document text
    • https://9005a25f-7293-4a73-bb0f-bc58e8c16807.filesusr.com/ugd/e3834b_6c511bc78e8b48b0a511fd98e274b573.pdf?index=trueIn PDF document text
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_8769344dee164b338140a3918a01f26e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c530062f-5d0f-4039-9571-a15d1e6d15c0/30780814586.pdfIn PDF document text
    • https://fc9a8e44-b853-4378-b933-957c6fa9ceda.filesusr.com/ugd/1da781_1adaf778b8124b05a92d006c476314e6.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A9 5636 bytes
SHA-256: 8428c5c365f02c482913dfb41500e06fa11ac7e75bd7454d210070fdafed48b6
font_01_sfnt_off00011ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE9 11232 bytes
SHA-256: 2651e6f193b76e797f904ab1a92dee3057fa2eb144c9f3a3312b8869489db867

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