Malicious PDF — malware analysis report

Static analysis result for SHA-256 14039487cade60e8…

MALICIOUS

PDF

88.2 KB Created: 2021-02-17 23:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 69b7fc68b6c87766a9b366153e25aec7 SHA-1: 8493eb5ac131eae241d5155a928452edf5c1b52b SHA-256: 14039487cade60e85abc1dec72fa9c7a323037e3559e4fd9a9c826986723472e
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicative of a link farm or SEO spam. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

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://maypoin.ru/wix?keyword=steven+universe+book+guide+to+the+crystal+gems PDF link annotation
    • http://sethel.xyz/puruxuac8pm.pdfIn PDF document text
    • https://cdn.sqhk.co/sivunukiwe/cgjqhf8/stuart_rider_app_download_ios.pdfIn PDF document text
    • https://koreluluzoma.weebly.com/uploads/1/3/5/9/135972167/7b0aea11b9ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470960/normal_6021675d6262f.pdfIn PDF document text
    • http://ourfutures.space/caligrafia_gratis83r79.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/fMfrjjp/gijuvefisemit.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/flhfgfF/the_whip_tavern_owner.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/qT7ialm/wuwobono.pdfIn PDF document text
    • http://tiktokhd.design/linojizududa4fm.pdfIn PDF document text
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/608c4f0fda.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/bupijila/handlettering_alphabet_vorlagen.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/singh_is_bling_movie_full_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/comal_county_sheriff_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/jusogon.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_off0001115c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115C 5820 bytes
SHA-256: 5b43174c9644349ecbd4b3cfbb2adc03ca3f69e157e8c31d3cb05752519a4ad5
font_01_sfnt_off00012510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12510 14908 bytes
SHA-256: f1c6c54168b1abfc27496b1cb91ccbf8f74fb2d3d8f83929e412d97340c16994

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