Malicious PDF — malware analysis report

Static analysis result for SHA-256 c673f2b9e35a336a…

MALICIOUS

PDF

72.2 KB Created: 2021-02-25 00:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 40a15f88d54e3c94f7b5cc936a204260 SHA-1: 2d571bb914c7c754e4fa8d9a58800cd7a64e350a SHA-256: c673f2b9e35a336a5a13bae5cf9417f7d6f189fc84e6201181c43c2ffbc9c1a2
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=scappoose+school+district+calendar+2020-21 In PDF document text
    • https://tifutijije.weebly.com/uploads/1/3/2/6/132682998/votuxurep.pdfIn PDF document text
    • https://dapapakutuluj.weebly.com/uploads/1/3/1/3/131384169/e65d3dc37cb3.pdfIn PDF document text
    • http://wersita.fun/juresewegenegajok4klh1.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/sabertooth_x79_memory_compatibility.pdfIn PDF document text
    • https://bofisolipog.weebly.com/uploads/1/3/4/4/134438855/8319e4778760.pdfIn PDF document text
    • https://lobalose.weebly.com/uploads/1/3/6/0/136089755/redato_getekaligub_xemaziv.pdfIn PDF document text
    • https://gipimosikiji.weebly.com/uploads/1/3/5/9/135963651/9349837.pdfIn PDF document text
    • http://skidki-day.site/78589587424s5rsn.pdfIn PDF document text
    • https://lemusudavigi.weebly.com/uploads/1/3/5/3/135395292/zaganaja.pdfIn PDF document text
    • http://pr-bux.online/68324216064qapiv.pdfIn PDF document text
    • https://fobinoxibenor.weebly.com/uploads/1/3/1/4/131437242/7312602.pdfIn PDF document text
    • https://xexiroxenokela.weebly.com/uploads/1/3/4/6/134613030/basazudawij.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/the_lord_of_the_rings_the_hobbit_book_review.pdfIn PDF document text
    • https://belukuxar.weebly.com/uploads/1/3/5/3/135312366/9840158.pdfIn PDF document text
    • http://kekisire.22web.org/sathuranga_vettai_2_movie_tamilyogi.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/9923439.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/1063903669.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/bixixanowuzexuzanunu.pdfIn PDF document text
    • http://tehnotop.space/rimojazejaripe88spk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97B 5624 bytes
SHA-256: d8c2c8cbcd79b6c1921323a450b03d18774321ef385d83b2ae4779c0ef8c2367
font_01_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 10752 bytes
SHA-256: 3137133a3dd7d06f333577d6917876b9e155d991e98abcdc891fd5bc29d07c5c

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