Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1134cb095adcdd7…

MALICIOUS

PDF

75.7 KB Created: 2021-02-08 04:45:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9d6de7a3cb9f1a378a10498b9f6a140a SHA-1: b2d5363c924026ab246b63ae9818478d48f97152 SHA-256: c1134cb095adcdd710cf4a767fa0585a4792268283f05c5ebc14190e291d1432
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on services like weebly.com and sqhk.co, indicative of a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly suggests maliciousness. The embedded URLs and the PDF structure suggest an attempt to drive traffic to potentially malicious or deceptive content, aligning with phishing or scamming pretexts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/aws?utm_term=haunted+house+2+game PDF link annotation
    • https://cdn.sqhk.co/puvegipuros/C1jeji7/pugeteveluliwose.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/gunaratez-tamerasete-forizokepab-gotik.pdfIn PDF document text
    • https://wezalowesugalu.weebly.com/uploads/1/3/2/8/132815960/8426790.pdfIn PDF document text
    • https://dawekemukodo.weebly.com/uploads/1/3/4/4/134491409/libip-xolukujomakimew.pdfIn PDF document text
    • https://zobigitesi.weebly.com/uploads/1/3/4/6/134691723/0c1899a.pdfIn PDF document text
    • https://cdn.sqhk.co/jesotipo/ijMiijj/scrambled_words_newspaper_game_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/hfqgdyh/moto_rider_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/qgjhhlZ/64749424590.pdfIn PDF document text
    • https://cdn.sqhk.co/ribukenige/Dfxhfjb/free_casino_games_with_bonus_rounds.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/ahh0gfl/nawanaragupimivi.pdfIn PDF document text
    • https://cdn.sqhk.co/namemedoxake/WH8bgcI/9587426180.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/TiUZ15J/sad_alone_hd_images_free_download.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/xuxogasezaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pipaneku/mexifolom.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/arsenal_vs_napoli_match_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/gobobutopukaregubatara.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/deleranubudakomubafakifo.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF41 5036 bytes
SHA-256: 8740bf7275bf193b1d5ad250c42f080d94e935583cb4d162d4b6e5d64e856438
font_01_sfnt_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 10408 bytes
SHA-256: fb73318a42c221972e255e16924b00a5a4028b7cc26f8d2a988c360e6601a313
font_02_sfnt_off000113b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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