Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76bc76202b51738…

MALICIOUS

PDF

64.7 KB Created: 2020-12-21 20:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7fe67a0daf33efd26d4f190fa5af538f SHA-1: 956fe2f6d0892adaac8bd24d222d9201114caaaf SHA-256: a76bc76202b51738f63bf73999537688121941d6f2478608f00e8f9cb8d5f761
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://traffset.ru/123?utm_term=working+at+wendy%2527s+canada PDF link annotation
    • https://mafupixalikufu.weebly.com/uploads/1/3/4/6/134662523/7022221.pdfIn PDF document text
    • https://fuloremazugad.weebly.com/uploads/1/3/4/3/134356453/3094137.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/buwozometev.pdfIn PDF document text
    • https://gojudewusidaza.weebly.com/uploads/1/3/4/8/134888042/matezazuragif.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/5190013.pdfIn PDF document text
    • https://zanafuwidug.weebly.com/uploads/1/3/4/3/134353074/393587.pdfIn PDF document text
    • https://fimelaxezabu.weebly.com/uploads/1/3/4/6/134622198/nokulolam.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/42bdbe9e6173.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/rorives/discovery_animal_planet_video.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf27e394f25741fd4c08e8/t/5fd608c1ab7772717685037d/1607862473822/87274609535.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6fe7f54d69c596232e783/t/5fcb162b64036b6143875426/1607145003803/moy_6_the_virtual_pet_game.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/weguwegupomas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9cf08d8ea14bdaa7a7fb/t/5fdcaa116542785c7ec97cfd/1608296978232/sorting_time_complexity_cheat_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce5823e48d292cf0cbf2d0/t/5fd1beea133bcb3b889d8cce/1607581420028/14083591386.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC045 5380 bytes
SHA-256: 4c93b00db6f38c4a3fcbd78e2efc83bba9bafb952dfd3f84d4f763b9f48cc433
font_01_sfnt_off0000d2ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CE 10364 bytes
SHA-256: b8cd2603415133b8e87e03d6a1645cc6b818824528b04ca0592f214cc242f2d3

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