Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fdbba2e27a0490…

MALICIOUS

PDF

76.9 KB Created: 2021-03-03 13:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3860da9eb0eaf3bb46ba57a28822a32 SHA-1: 77624757bd3056785e518f3463823eac5915353d SHA-256: 22fdbba2e27a049017fe66f22840b1b3f341c198455b9fb20ebd0f00e8d4ab2f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on cloud storage services and use numeric slugs, indicative of a link farm or SEO spam operation. The primary URL, 'https://lozipotod.ru/123?utm_term=what+do+raven+mean+in+spanish', suggests a lure to disguise malicious activity. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

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://lozipotod.ru/123?utm_term=what+do+raven+mean+in+spanish
    • https://cdn.sqhk.co/malevevipali/gzSJ5pj/koduvu.pdf
    • https://cdn.sqhk.co/noluxokeruma/5ibABgj/othello_act_1_summary_video.pdf
    • https://cdn.sqhk.co/xidatelo/jgdLigp/rimidiral.pdf
    • https://cdn.sqhk.co/zibomevuguli/Uicjcgg/studio_photo_editor_apk_old_version.pdf
    • https://cdn.sqhk.co/kebabefepu/bicAnif/pabedezumug.pdf
    • http://nogurufegu.mygamesonline.org/thank_you_mr._falker_by_patricia_polacco.pdf
    • http://veruvipavopa.getenjoyment.net/benedict_the_chrysanthemum_and_the_sword.pdf
    • https://cdn.sqhk.co/gusisitixinu/iYgc2jc/xtreme_monster_truck_racing_mod_apk.pdf
    • http://duzusedolatepe.mypressonline.com/the_book_thief_audiobook_free_download.pdf
    • https://cdn.sqhk.co/moxinivo/ngdMuII/subway_princess_runner_hack_apk.pdf
    • https://wixepivod.weebly.com/uploads/1/3/0/7/130775856/jibudujo-mesur-teralabumukano-lagolibokeza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/fezenur/73188629289.pdf
    • https://s3.amazonaws.com/bejokazemur/83531943815.pdf
    • https://s3.amazonaws.com/wurivuve/bubeki.pdf
    • https://s3.amazonaws.com/bamepofewalada/surface_area_of_cylinder_worksheet.pdf
    • https://s3.amazonaws.com/tinezedu/balance_sheet_in_sap_business_one.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e09d.bin
c7057e62691cee7203fcad796c0dfaf5e60a85f2b798dfc36c80ae23c4a22d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 5028 bytes
font_01_sfnt_off0000f194.bin
a581d39a0068c83db15c47f646ff4ae381f1e68c17cebc61c41d6250eff23e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF194 11268 bytes
font_02_sfnt_off000116d4.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116D4 4324 bytes

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