Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03d095df2630d83…

MALICIOUS

PDF

91.3 KB Created: 2021-03-14 10:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5822ec220f35dcaa9d7d77236b59f087 SHA-1: 295b1d58f6803589dcd728dcba0db34dbf2dc7cb SHA-256: a03d095df2630d83d4bf624a62870a0cab5844d29e2a25362c22766537b92348
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam and phishing. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document is designed to trick users into believing they are entitled to a prize or funds, requiring them to click a link for delivery. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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://pelibifir.ru/wix?keyword=mastering+biology+10th+edition+pdf
    • https://static.s123-cdn-static.com/uploads/4456989/normal_5ff0873174e86.pdf
    • https://kevonixoxudunu.weebly.com/uploads/1/3/0/7/130775897/miwamulimifabajosoj.pdf
    • https://cdn.sqhk.co/nokotadi/KOedYjj/nonidatuperomigapibepe.pdf
    • https://lirodenagegoket.weebly.com/uploads/1/3/1/4/131437677/a52444b.pdf
    • https://static.s123-cdn-static.com/uploads/4480399/normal_5ff7d4444a714.pdf
    • https://cdn.sqhk.co/divoxisig/Oidhegf/cake_designs_images_cartoon.pdf
    • https://zozolesib.weebly.com/uploads/1/3/4/6/134631165/rimokevo-zunugigisuza-zejosape.pdf
    • https://cdn-cms.f-static.net/uploads/4479236/normal_604d0def26954.pdf
    • https://pagafika.weebly.com/uploads/1/3/5/3/135339488/vatike.pdf
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/09f535.pdf
    • https://cdn-cms.f-static.net/uploads/4403960/normal_602ec726cba7b.pdf
    • https://zufuleruzu.weebly.com/uploads/1/3/1/6/131637307/benizi_nubuvajupisiko.pdf
    • https://sitekitenuzuvi.weebly.com/uploads/1/3/2/3/132303150/32763.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f4d62457-3b90-424d-9714-16034f2565e6/remington_model_11_serial_number_location.pdf
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_22187374ac9d4a1bb4e7103b44987786.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81deed32-d8cd-47e2-b22d-2d5e02c91e4e/xudet.pdf
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_b5ffb31b1539448eb12e05797617e371.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6bb19be8-e549-4fca-afce-0edad5db908e/35750478896.pdf
    • https://uploads.strikinglycdn.com/files/8c69b86e-ee90-40da-83f3-505cd0790c0f/chinese_symbol_for_adventure.pdf
    • https://uploads.strikinglycdn.com/files/c4110795-be8d-4bff-a5fc-54ce3030352c/fidagudepigo.pdf
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_bcd4e65a067f4d968eba9bb3efc900ea.pdf?index=true
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011769.bin
92bc3982d4fe0a774b3e5fb79cd4f1fa3a49fd498b30a3360f90c498bce06a01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11769 5532 bytes
font_01_sfnt_off00012a31.bin
72a12bc97640bf83a5dd6600d30d54b5704d18c6e1331838de38c748d2b07cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A31 11756 bytes
font_02_sfnt_off000151c4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x151C4 4324 bytes

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