Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3db1050df0ce05a…

MALICIOUS

PDF

71.7 KB Created: 2021-02-18 01:10:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ff979e154d1a06ae8b80a0856146ebb9 SHA-1: bab99d678dcfd9863100807be5a4d70a50b4ce32 SHA-256: d3db1050df0ce05aaea1e8259512680498b8b7ca485b504f65546189ff0ae22a
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, including critical alerts for linking to known malicious redirectors and hosting a large link farm. The document body, though obfuscated, suggests a lure related to 'breaking news'. The numerous embedded URLs, many hosted on disposable domains, indicate an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

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/strik?utm_term=what+is+the+breaking+news+in+the+world+today In PDF document text
    • https://cdn.sqhk.co/luxanimev/LidJlSQ/nilidusilir.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/wijBsuJ/9845935706.pdfIn PDF document text
    • https://lenapejasuma.weebly.com/uploads/1/3/4/7/134749539/4310158.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/ejgyhd4/74518050962.pdfIn PDF document text
    • https://rupijike.weebly.com/uploads/1/3/5/3/135312351/9143388.pdfIn PDF document text
    • https://xoxomupufolud.weebly.com/uploads/1/3/0/9/130969418/e76cebca0a6.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/ULan8M4/41093771821.pdfIn PDF document text
    • https://nawexolaka.weebly.com/uploads/1/3/4/7/134704757/nofud.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/Mgfzf79/utopia_definition_english.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/cahbj23/42639733148.pdfIn PDF document text
    • https://cdn.sqhk.co/toralapiluw/hrjdjj8/6014128597.pdfIn PDF document text
    • http://zifujujefilat.iblogger.org/65273764947.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotisonuli.epizy.com/2016_mazda_3_android_auto_retrofit.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/assistant_font_family_free.pdfIn PDF document text
    • http://pexoroxijaseduj.rf.gd/xarisoto.pdfIn PDF document text
    • http://soxalisaxofaba.epizy.com/14216441178.pdfIn PDF document text
    • http://wumumusonozukak.epizy.com/2003_buick_park_avenue_ultra_performance_parts.pdfIn PDF document text
    • http://rinotox.rf.gd/dysplastic_nevus_treatment_guideline.pdfIn PDF document text
    • http://zopatirek.epizy.com/fosiwuvuduz.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_off0000dab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB6 5496 bytes
SHA-256: e20a4a5d3bc8210e4f8d002af01f0285d2396219b9a2d0e512777939604900f6
font_01_sfnt_off0000ed76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED76 10396 bytes
SHA-256: 31caf39d206f453a8cec524a33743d976f30839bbc121621cd643f2c8b6b070b

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