Malicious PDF — malware analysis report

Static analysis result for SHA-256 488530f622b137f5…

MALICIOUS

PDF

68.6 KB Created: 2021-02-18 21:12:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a5f31a94391475fe2c72f4cdb05a1e97 SHA-1: 777f38059f7f4dcb92000debf04c082cb1e11e7e SHA-256: 488530f622b137f543b4b4e92a4285a47a74f518ed2ea3a1397212991d594257
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://baarspo.ru/123?utm_term=2010+toyota+prius+reset+oil+change+light PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454562/normal_5fe7bf3a626f6.pdfIn PDF document text
    • http://dutov.org/22052428158cnvog.pdfIn PDF document text
    • https://wuzitefagoxu.weebly.com/uploads/1/3/1/8/131856046/8aee778e9088c.pdfIn PDF document text
    • http://crispyset.online/zepir1ce1c.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/monument_valley_az_tent_campingxrm1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5fe8f86bcc19e.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/9365374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476421/normal_601fa90be803f.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/verepox.pdfIn PDF document text
    • https://jusodizepo.weebly.com/uploads/1/3/1/0/131070216/fogagur.pdfIn PDF document text
    • http://storeeu.info/books_of_the_bible_printable_cardsss12s.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/jexexef.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/bibejovixapis/best_paid_tower_defense_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/gagilezo.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/facebook_icon_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/simofamise.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_off0000cfae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFAE 5528 bytes
SHA-256: 0f3eb7461f9534ad50d7ee473b7da1360ed2436adee777ad37be9899eeef2b1c
font_01_sfnt_off0000e285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE285 10228 bytes
SHA-256: cee197009816ecb7be80574cbf825cc4bef7ae244588335e86c35486743dbeed

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