Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ab3c2ec5716a29…

MALICIOUS

PDF

91.1 KB Created: 2021-05-22 17:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 41d3880431a8bc76f1fe8348fc8f0fab SHA-1: cece84df8866654a27bc87b915e579d163cab430 SHA-256: 22ab3c2ec5716a29d6c8e0aa90ba220d8375013de345293e4494a0f546bd56c8
164 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a PDF link farm heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of external URIs and the overall structure suggest an attempt to redirect users to potentially harmful websites, likely for phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://druttle.ru/strik?utm_term=strongest+dino+in+ark+2021 PDF link annotation
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/toxuzezosipafut-bixiraw-xututawal.pdfIn PDF document text
    • https://wadodimimilupe.weebly.com/uploads/1/3/0/8/130873890/zubizurupilejubosik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391621/normal_5fff40abbaa8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5fe704d18918e.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/gilane_sageximidig_wejosav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474470/normal_6023a48a25900.pdfIn PDF document text
    • https://fipaziditude.weebly.com/uploads/1/3/4/4/134465794/nafesaka.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/dazovosugev/stihl_trimmer_buy_online.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/windows_command_line_reference_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/laxupubidipe.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/wagafijizade.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/85351579940.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/multiplying_and_dividing_negatives_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/how_to_set_up_your_fishing_pole_for_striped_bass.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/poweredge_r710_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/76195822948.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_off00011a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A42 5452 bytes
SHA-256: 56b1ae5db3c484883a6b2f053a468af7feaf75b8b44f16b3338eefde88377e12
font_01_sfnt_off00012cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD4 2904 bytes
SHA-256: 9ee7db78a680e954fc83827cb3b0ef6d483254f0c29ad6cde1ee3630ce45ecab
font_02_sfnt_off000138c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C7 11200 bytes
SHA-256: 1e4973c5d4a908893828df64b7768b930a3b12ae0a2815c85c0d8a375532a9f9

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