Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddad7e5cf57236dc…

MALICIOUS

PDF

63.4 KB Created: 2020-12-11 05:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: bced61445a3c9212b17e4d4f71c78ca4 SHA-1: d4f92ed77bff73ab3f81041325e8996381ef3732 SHA-256: ddad7e5cf57236dccd1d23af9f718bd30f1085a05ff1e563574df5dddf8be746
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to potentially harmful sites.

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://trafffi.ru/strik?utm_term=tamu+writing+center+presentation PDF link annotation
    • https://tevitoretej.weebly.com/uploads/1/3/2/6/132680933/8788817.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.pdfIn PDF document text
    • https://mifugitosa.weebly.com/uploads/1/3/4/6/134631290/rolopafut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383170/normal_5fcf979857ca4.pdfIn PDF document text
    • https://wenadexedodoren.weebly.com/uploads/1/3/4/3/134322255/7104972.pdfIn PDF document text
    • https://dawugagulinejud.weebly.com/uploads/1/3/4/3/134368664/4021827.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/buvukujixasinaloke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc18f8d0a2757459be7919f/t/5fccb9de5177ea328cbed3c3/1607252453044/absorption_atelectasis_peep.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/jagavegomelofejigoteliwet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38541239b07229141ccc8/t/5fc9ceb0e262c01594632911/1607061169115/36135010541.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/bmp_tri_county_special_education_cooperative.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ec1b7848ba205d25c866/t/5fc5bbc8173fb5383b69fd9b/1606794185090/49129509863.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/palace_inn_houston_tx_77036.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dda31452f90b7fe53205/t/5fc1d58f145a8629dcf3f3bd/1606538644985/87817368561.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6684c116eb00e3c71b053/t/5fd1759aeeaf2774ac82c2ef/1607562650737/muxuxonifuzuziwixikula.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB972 5264 bytes
SHA-256: 1cff7b091281453866143ff92ccf4e42a422e3de00eb239af2637b9cc59884dc
font_01_sfnt_off0000cb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB55 11024 bytes
SHA-256: 1b194609ba317ff852612ed7e9a709cfa33bbf1320fe91295c21704f5fb8a031

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