Malicious PDF — malware analysis report

Static analysis result for SHA-256 be905fc8abba34e7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-25 00:36:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e0f2452cd39327e11336be016547bb9f SHA-1: ec2a71704d4635985f2dd8c73adb420b34694429 SHA-256: be905fc8abba34e708230a9ceb898118d8fd76c6fe1af7a32dd846d819efd78f
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://leonvi.ru/strik?utm_term=miniature+dachshund+puppies+for+sale+nyc PDF link annotation
    • http://pifedalune.medianewsonline.com/zodudum.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/hachihb/58506482585.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/chjU1tw/twice_pixel_art_color_by_number_download.pdfIn PDF document text
    • http://zexawabezazojot.sportsontheweb.net/analise_morfologica_exercicios_com_gabarito_6_ano.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/ajbgfkr/66041562983.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/i7gg9hg/candy_bomb_fever_mod_apk.pdfIn PDF document text
    • http://zopesozali.mypressonline.com/jibivu.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/ggEjj58/wild_wings_near_me_now.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/ijjnVaj/59178857258.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/zuwimadaneb/60870750054.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/robafinaturis.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/ruxewuximulibavowesawasus.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/bisovoma.pdfIn PDF document text
    • https://627ea4a7-3f28-4bf3-8c99-6a9da7dacf48.filesusr.com/ugd/1970e2_acb2c8dc9e2748fc81e77887204cd690.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/dijiredeganabarenetevatuk.pdfIn PDF document text
    • http://kepewitibafef.myartsonline.com/36789199196.pdfIn PDF document text
    • https://651f5d5e-5f42-4fb0-8380-889764ca350f.filesusr.com/ugd/b2f7c1_93ae83fc2eb14e2bb548e32288133f04.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/89502628272.pdfIn PDF document text
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_6ddf3fa6f1aa4af487a8e5b19cc38aa7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/83649794666.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/toward_a_tribal_critical_race_theory_in_education_summary.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_off0000e8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A2 5352 bytes
SHA-256: 0e903dfa209d4bf64f0f9bc5566e0be05d666f6dd15ff185aaaba548eb8f3daa
font_01_sfnt_off0000fae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE7 10524 bytes
SHA-256: bed5f78897fbb53661fd9084cbd8b4b2ce29e4f2e2c5dc0fc4efa5371f082245

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