Malicious PDF — malware analysis report

Static analysis result for SHA-256 f032a7b7bf6526bc…

MALICIOUS

PDF

83.7 KB Created: 2021-03-29 14:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7069603203ca67059d298f3923b0b174 SHA-1: b7f7f7df50f3c0c48417fa6cd755a46bad192e4c SHA-256: f032a7b7bf6526bcfcb88f3939e343c1dbf307de37713b6357f0240845c65317
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting it is part of a link farm or SEO spam operation. The primary URL, https://mezovuduw.ru/wix?keyword=wirehaired+pointing+griffon+rescue+florida, is likely used to direct users to malicious or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/wix?keyword=wirehaired+pointing+griffon+rescue+florida
    • http://fumatiw.mypressonline.com/aws_interview_questions_and_answers_for_devops.pdf
    • https://senidexug.weebly.com/uploads/1/3/0/7/130775540/kisonu.pdf
    • https://cdn-cms.f-static.net/uploads/4470017/normal_602d96752c37a.pdf
    • https://cdn.sqhk.co/xepiriza/SjaU2M1/larunosajutizekari.pdf
    • https://cdn.sqhk.co/zikufivol/egTpve4/54442793189.pdf
    • https://wosapinilesodiw.weebly.com/uploads/1/3/5/3/135347506/jofesaninofadik.pdf
    • http://tezijexipilimo.getenjoyment.net/wow_where_to_buy_wolf_mount_in_orgrimmar.pdf
    • https://cdn.sqhk.co/wojinagimepu/350hgif/ecommerce_free_website_templates_for_flowers.pdf
    • https://bebopajuze.weebly.com/uploads/1/3/5/3/135312866/fcc161788703c66.pdf
    • https://cdn.sqhk.co/laxuweredex/ggLqQwu/armani_women_s_coat_size_guide.pdf
    • https://lobixeximoruse.weebly.com/uploads/1/3/5/3/135319822/6229977.pdf
    • https://cdn-cms.f-static.net/uploads/4367005/normal_603b00b1b4c46.pdf
    • https://lirodute.weebly.com/uploads/1/3/1/8/131871659/7987219.pdf
    • https://cdn.sqhk.co/sirijunubi/gjjjXij/78532696820.pdf
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fc5f99cdf6ea.pdf
    • https://static.s123-cdn-static.com/uploads/4372707/normal_5ffcf52084bd1.pdf
    • https://cdn-cms.f-static.net/uploads/4500887/normal_604196e67e1ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_a3a11000125a4da6b91e47cfc7eb4d7f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ada573c2-20f0-40c6-9801-165e2bb48509/can_you_bake_potatoes_in_an_electric_skillet.pdf
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_58fa8d99e39a468e99697165138f88e4.pdf?index=true
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_40578d39a3c3476b883c82d2d9d0f38e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cc4bd3cb-b35a-4589-9a54-46ba8b7d145a/what_are_the_parts_of_a_kitchen_faucet.pdf
    • https://uploads.strikinglycdn.com/files/de63275b-024c-4d0d-bba1-edb6567cb450/29732059456.pdf
    • https://uploads.strikinglycdn.com/files/0bc902fa-fcf9-4e23-9bfd-8c49169f2f9d/samsung_un65ju6500f_price.pdf
    • https://uploads.strikinglycdn.com/files/f58b0884-9f80-44cc-8053-8bfea4e8a825/24618752686.pdf
    • https://eeeff038-21f9-42a6-bde0-cd945221d618.filesusr.com/ugd/9dc459_c182d35b93f04a36b26c95ac6d32d842.pdf?index=true
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_7105b846cf6c497f84bd652a3c148dca.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee97.bin
87ff560eefa7d191b4bdf9b91466bf31e38f5150e88c3cecc88e66c37d8ba292		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE97 5432 bytes
font_01_sfnt_off0001011f.bin
73a98fb6820a3953a09f2b180240be3d44fe64eee20c8f4f39f9c20a354ed225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1011F 12088 bytes
font_02_sfnt_off000129a7.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129A7 16204 bytes

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