Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9757b8204389a69…

MALICIOUS

PDF

82.5 KB Created: 2021-04-08 16:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dce0f21ed663af0e6616928335064587 SHA-1: f3431bb6a7e13bb3a10324ec4fb94dd9f8be0147 SHA-256: a9757b8204389a6966b0bd56b98dfc861dd8830e400af4fb08aae07220588584
156 Risk Score

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 0.9997

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://zajinet.ru/strik?utm_term=frigidaire+fad301nud+30-pint+dehumidifier+manual PDF link annotation
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/jejulizaguzab-xatezez-waveze-kawufuwimixi.pdfIn PDF document text
    • https://cdn.sqhk.co/regavebike/3mifjbY/36066954202.pdfIn PDF document text
    • https://cdn.sqhk.co/mijajijem/fgfpjf2/69096880493.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/NMBeMii/36879019940.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/kodeboti.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/who_goes_there_book_review.pdfIn PDF document text
    • http://jetinaxisodew.mypressonline.com/sample_magazine_layout.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/pizivowe.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/bipepezuwed/kosowomuwesedadiga.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/what_are_the_themes_of_african_literature.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_82df14ac2c074ea29eeea849af06436c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/refukuwuvesodoselanolewex.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/anpadh_film_song.pdfIn PDF document text
    • https://ba789de2-c385-43ee-b32d-a34c698d1993.filesusr.com/ugd/b7082a_9a0caa0b7f944f39a94d06b734c0fca0.pdf?index=trueIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_d6dc196605da47e98511a5ef11f471b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mipizaju/dungeons_and_dragons_5th_edition_online.pdfIn PDF document text
    • https://abe99a74-823b-4c5d-85d6-f8d8de52422f.filesusr.com/ugd/73cc63_aa13c019b48e4d03a6f10e536f963351.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_off00010085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10085 5620 bytes
SHA-256: d262214a4a7c02fb96c4db8191b9cccff0aa5e7fb3ff38cc44f107d38e4c69a8
font_01_sfnt_off0001138e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138E 11676 bytes
SHA-256: cee4c60583247e471f3c3f452624b1d8c1d5e82de085cf5867ebdbb25e46b231

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