Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bffd3bb010cf3f…

MALICIOUS

PDF

65.5 KB Created: 2020-12-23 01:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1178e19c8aff7eb2dba55f11b26dee53 SHA-1: 3aa991ce6b744e18c3b67be1fcf5001f231dbeb5 SHA-256: 80bffd3bb010cf3ff6252e0b250541a9ebc94d3211dc2d4ae43d6828b3f2e2ef
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least two identified as malicious redirectors or part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' directly point to the attack pattern of directing users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=antique+mirror+sheet+dubai In PDF document text
    • https://poxejoretojav.weebly.com/uploads/1/3/4/7/134740271/xapunivokaguwu-petuxeja.pdfIn PDF document text
    • https://viropozokuputaj.weebly.com/uploads/1/3/4/4/134441516/vijufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8a3be29-cd85-4b15-b39b-aaa45255d955/xazadupigagasumepalupede.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/voxonigupexev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7820a04a8c57c148abc30/t/5fd70814df2f0204c24d453a/1607927830794/bcbs_florida_provider_enrollment_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/57276448614.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/nwea_scores_chart_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6965cd26ff1194f9b5aa7/t/5fd6681e154d727871ec835b/1607886880108/65519552977.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/93214601056.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/zonajobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45307e85-c6ca-4884-91f8-c53d345bb0c3/91115950441.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc599753398ff75154dc615/t/5fcf4d20cd9a2056ff738adb/1607421216518/84406098478.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_off0000bfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD2 5288 bytes
SHA-256: 57be640e2664ca332b08feab519b7908e49d1ea9d42cb6e5042bbab23980aed2
font_01_sfnt_off0000d197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD197 11324 bytes
SHA-256: ecc085d213d4f5c80fe7a396c334a66a129873bc0e8690d3840e3cd6401f26c3

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