Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f472cea450dd53c…

MALICIOUS

PDF

77.0 KB Created: 2021-02-15 01:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 0460d5c58c697c4e567ccdd56cf65cf5 SHA-1: 2d6597e2d4654fec3e390a61c8a4c4fa9836dfe7 SHA-256: 7f472cea450dd53c02c5e7d86fc6240a6b613b8bd3748c5c325a13b177e0bbbd
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a malicious link farm designed to lure users to potentially harmful sites.

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://bologen.ru/aws?utm_term=soul+movie+apk+for+pc PDF link annotation
    • https://tesewipelevifiv.weebly.com/uploads/1/3/3/9/133997178/884c3c50ed10a.pdfIn PDF document text
    • http://ebay-coupon.ru/17302495705lwy3p.pdfIn PDF document text
    • http://znakomstva18x.site/385914314690mqqu.pdfIn PDF document text
    • http://goodik.fun/sight_and_sound_magazinev33h4.pdfIn PDF document text
    • https://towelekuw.weebly.com/uploads/1/3/1/4/131406253/dajawit.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/nozibojurewupigo.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/zukolosuwaj-texigedidira-denegun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487208/normal_5ffd7911807fe.pdfIn PDF document text
    • https://soliduratop.weebly.com/uploads/1/3/2/3/132303261/67bfca104.pdfIn PDF document text
    • https://vilinumatilaji.weebly.com/uploads/1/3/2/7/132740241/degima.pdfIn PDF document text
    • https://bimipesetasezi.weebly.com/uploads/1/3/4/0/134017520/ed3f0.pdfIn PDF document text
    • https://besajiti.weebly.com/uploads/1/3/1/8/131856076/wexakarut.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/15054117356mygcq.pdfIn PDF document text
    • http://raftgjgr.space/nomiwedipftb51.pdfIn PDF document text
    • http://dkblogin-de.com/83964395964h8kig.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/bogizirulemumaf_baxegofasorolog_finesefuxodabo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/breakup_diary_status.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/tamil_yogi_hd_movies_in_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/lojagifi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 4908 bytes
SHA-256: a543dd17b67295d9c68fd49c62e1ef57528dfec999aca1a8ab81d026b4209e38
font_01_sfnt_off0000f461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF461 10532 bytes
SHA-256: e7988784509937a7909e4034c082bd000a6d058cffd8ed03c53e42a624a808f5
font_02_sfnt_off000118a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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