Malicious PDF — malware analysis report

Static analysis result for SHA-256 b01d20068f8f9160…

MALICIOUS

PDF

80.6 KB Created: 2021-02-05 05:31:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f8eca3e1e30d36026a209d9352d7abb0 SHA-1: 889425f9e4614d9da1ac6110616c65789be38b04 SHA-256: b01d20068f8f91604afd7dd294c85be83b18ab7871f72bb3aaa7141afe03247a
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL like 'https://jacksth.ru/123?utm_term=one+love+2003+full+movie' indicates a lure to download content. ClamAV and ML heuristics confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://jacksth.ru/123?utm_term=one+love+2003+full+movie PDF link annotation
    • https://cdn.sqhk.co/xamitarerivu/sjcijhd/7167900297.pdfIn PDF document text
    • https://jigupipugefelo.weebly.com/uploads/1/3/4/3/134387822/16c9733a7cb.pdfIn PDF document text
    • https://lobavasato.weebly.com/uploads/1/3/1/4/131483685/4253692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460457/normal_5feb4695748d2.pdfIn PDF document text
    • https://vonewujin.weebly.com/uploads/1/3/1/3/131380349/82bfae2b80954.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/Rc3Pial/walking_dead_no_man_s_land_radio_tips.pdfIn PDF document text
    • https://sixutaxujarupi.weebly.com/uploads/1/3/4/8/134882582/5380810.pdfIn PDF document text
    • https://cdn.sqhk.co/lukapokobejo/ghjgcZ3/cabin_fever_word_meaning.pdfIn PDF document text
    • http://didavixakodix.22web.org/escala_de_resiliencia_cd-_risc.pdfIn PDF document text
    • https://cdn.sqhk.co/xotabuti/ijgfggQ/superhero_coloring_pages_free_online.pdfIn PDF document text
    • https://dekamukovesu.weebly.com/uploads/1/3/5/3/135324216/lewibewilonivuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467030/normal_6008a732e27a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5ff0a5c57df89.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/jofoziv.pdfIn PDF document text
    • https://taleputara.weebly.com/uploads/1/3/4/3/134305900/wikexesijajifivefir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5ff7d5ba5c929.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://visobiwedixupip.rf.gd/97776834580.pdfIn PDF document text
    • http://jominata.rf.gd/pimejazisubez.pdfIn PDF document text
    • http://lenepozomewu.epizy.com/marvel_strike_force_best_farming_guide.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_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 4952 bytes
SHA-256: e600eba86aa055b45925a1178a3e325362dceec2cf526f804eb298df8c169ece
font_01_sfnt_off000110b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B4 10808 bytes
SHA-256: e0d42782dfecc3e4b4158aea2ef9628f17885424733eb062f585197cf707ea2c

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