Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9570099a56280df…

MALICIOUS

PDF

93.0 KB Created: 2021-03-14 05:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50da7158566fdb6f095f12ab9e623b2c SHA-1: d231dbb819492fa79ce9b03193bf2df67b2f4e8b SHA-256: c9570099a56280df49c5130ea3be32f2df0c4806eaaf6a3f6001fd765028004f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, and is detected as malicious by ClamAV and an ML classifier. The primary URL, https://mezovuduw.ru/award?keyword=biotransformation+of+heavy+metals+pdf, suggests a lure to a site that may host malicious content or phishing pages. No scripts were extracted, but the PDF structure and link farm heuristic indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=biotransformation+of+heavy+metals+pdf
    • https://cdn.sqhk.co/fiwujumejuf/tlhi0cR/house_flipper_money_cheats_ps4.pdf
    • https://cdn.sqhk.co/vujaderaz/cgeLijh/81137952746.pdf
    • https://cdn.sqhk.co/vobevufubito/537JicH/download_hack_car_driving_school_2016.pdf
    • https://cdn.sqhk.co/foroboreb/hjfidgc/latest_pakistani_audio_songs.pdf
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/sebelekulupovu_dedul.pdf
    • http://strapslap.online/sevadigagadomegugutoauon9.pdf
    • https://cdn.sqhk.co/tifisizeliz/jjcNpg9/11853156651.pdf
    • http://lofitner.buzz/75060057439l06ru.pdf
    • https://cdn.sqhk.co/lexelinowe/jj5xmjh/stuntman_ignition_xbox_360_youtube.pdf
    • http://tertov.xyz/how_to_connect_a_siren_to_a_dvrntrg0.pdf
    • https://nibuduki.weebly.com/uploads/1/3/5/3/135314859/guboxon.pdf
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/lelufozarufar.pdf
    • https://cdn.sqhk.co/ruperodu/ccYheM5/46411314157.pdf
    • https://cdn.sqhk.co/fugovigul/1ifihgi/52341850374.pdf
    • https://cdn.sqhk.co/vudupapuj/UgjPqIh/traffic_rider_download.pdf
    • https://cdn.sqhk.co/nawakema/KNjbAic/zinanelanefuranefom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c36efdde-2309-4ce2-a10d-b6df2ce12cd8.filesusr.com/ugd/e98059_e72db0adb7614952a89457c771842162.pdf?index=true
    • https://s3.amazonaws.com/kezemiradigu/jexuzazomozojarodaxo.pdf
    • https://s3.amazonaws.com/fezenur/kesulobufagok.pdf
    • https://s3.amazonaws.com/zonebon/translate_japanese_app_android.pdf
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_107317f508944540a8199ee800f4bbd1.pdf?index=true
    • https://b585a76b-fab5-4024-b0d2-f3ad95444197.filesusr.com/ugd/404203_b3e9c41a554140a38a1960097e85c24c.pdf?index=true
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_1c833a2a61df46d28f9284a2e53b7458.pdf?index=true
    • https://s3.amazonaws.com/zonebon/is_pretty_little_liars_being_taken_off_netflix_canada.pdf
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_def34d87b82b4e12be0a4fd7aab4297e.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ec2.bin
5544480caced4b1cdf666465f384a859c4d915d48b6149082f4743009a7126b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC2 5492 bytes
font_01_sfnt_off00014156.bin
ac17ec3a786efe280eb55e563b642bf80cc7acc66eef5dd388ec021c23544a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14156 11572 bytes

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