Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c8051f32065f19…

MALICIOUS

PDF

83.0 KB Created: 2021-04-15 01:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d061596121c4c7e296c34fc25b93f5f5 SHA-1: db95d3a1efe1c9c2c721bfd876a85fea6f0ff8f2 SHA-256: 60c8051f32065f190153427c33356378cf156abc38e03b7bf33dbf5557f1d9eb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain ('pelibifir.ru') that is likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'secured transactions outline nyu', suggesting a lure to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=secured+transactions+outline+nyu
    • http://xosubowavenu.mypressonline.com/definition_of_forced_migration.pdf
    • http://netolenogafa.getenjoyment.net/dexawebuxejaxin.pdf
    • http://safijejog.mygamesonline.org/35504408688.pdf
    • https://cdn-cms.f-static.net/uploads/4490961/normal_600df8bdc3276.pdf
    • https://static.s123-cdn-static.com/uploads/4475725/normal_5fefa9dda9c3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_1826c08cdca34869a36dda54176c969e.pdf?index=true
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_df1cbde0b26341f2857d10c701e6e146.pdf?index=true
    • https://s3.amazonaws.com/gateme/what_does_the_song_go_ask_alice_mean.pdf
    • https://uploads.strikinglycdn.com/files/0c63685e-cd4e-41b8-91ce-f9473a1bd9b5/33906768821.pdf
    • https://uploads.strikinglycdn.com/files/21697f6b-92aa-41a7-bb89-f9250aabc0e1/why_is_the_setting_important_in_ap.pdf
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_b2e64ffb6b2d44e1876872af88ed07fb.pdf?index=true
    • https://s3.amazonaws.com/palikuvexake/advanced_muscle_building_program.pdf
    • https://bef89f6e-6323-4b84-ad9d-a44490bfcc4f.filesusr.com/ugd/96768c_68a1574af1c84b5d892d39196c32ba15.pdf?index=true
    • https://s3.amazonaws.com/wuvepilamamuse/mozamexikababexorewixid.pdf
    • https://s3.amazonaws.com/kakekojezutok/how_to_change_rainbow_six_siege_server_ps4.pdf
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108ba.bin
f59a7798defa31277df4228f8686c38681f5404f3f59df2345b6ee0a117c927b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108BA 5136 bytes
font_01_sfnt_off00011a40.bin
aa92cd92c58fea3730704628cbaa5d981d1efa9a3cc956fb0622b919ccdebf2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 10872 bytes

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