Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccd8c775531d6d6…

MALICIOUS

PDF

83.8 KB Created: 2021-04-26 11:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 46e16abb176b0983c90c46c0c0cee552 SHA-1: 509fb42a8a0672b4dc6042ca0767cfcccfc18bf4 SHA-256: 3ccd8c775531d6d6d2ea519df6045465a72522fdd92a11427655c4d162227bba
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://nipisod.ru/strik?utm_term=what+is+the+proper+height+for+a+shooting+bench PDF link annotation
    • https://wumupokurura.weebly.com/uploads/1/3/0/7/130776197/zewiligifajokazivuzu.pdfIn PDF document text
    • http://sozefavi.22web.org/routing_protocols_explained.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_603d7170e98da.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/wjg8ibk/spiral_warrior_game_wiki.pdfIn PDF document text
    • https://nabezaxe.weebly.com/uploads/1/3/4/8/134852032/jujubiloger.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/jcDgehh/wedding_march_sheet_music_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374859/normal_5ff4baa73da92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5fd7e39dbe227.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/rabewiruzitewa/bauer_hockey_skate_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/18855509505.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/kindle_fire_video_format_update.pdfIn PDF document text
    • http://xedaxabefax.rf.gd/kamumun.pdfIn PDF document text
    • http://zoxutuperovizo.epizy.com/teralyst_hunting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/jurirexojanifivateguteba.pdfIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_28b53ddc1a574fc1adb3c44aa4a5e661.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libeganot/12111984262.pdfIn PDF document text
    • https://144ece88-722e-4d59-a9d1-ae16887514c2.filesusr.com/ugd/48b17f_57db8c85d0994b02b886fe4513592ef8.pdf?index=trueIn PDF document text
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_38ffd386d04a4b2b978573577524d67b.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_760671e067014fb390eed20a9bd35461.pdf?index=trueIn PDF document text
    • https://d668ac4b-7052-46b9-8d0c-7e282d24ced7.filesusr.com/ugd/00fc84_8bb144bffddd48a5a1f5eb449cc76a9c.pdf?index=trueIn 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_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 5396 bytes
SHA-256: 3e0721877269ec1c2b93b750755cf0c84d320007c95c1e4a52e1bf853366db02
font_01_sfnt_off00011a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8D 11012 bytes
SHA-256: 1a2f60eb94d98d90c52ce3a3a9c6c910ea8191ceed318d545b0cd9f076f08412

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