Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f444342efd418e3…

MALICIOUS

PDF

73.8 KB Created: 2021-04-01 17:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0b646815438e58bb2fa9e30ee711ade9 SHA-1: daa3d4670bb63193922c4fd533d78682cf581a70 SHA-256: 7f444342efd418e3229984ffbba489226cec8d52d2962adebccd49e761b16db7
176 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a callback-phone (TOAD) lure. 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 0.9995

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://druttle.ru/strik?utm_term=samsung+un32j4000ef+manual PDF link annotation
    • https://cdn.sqhk.co/xekemini/geqiehF/dekuvifog.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/cjct8K0/planets_align_july_19_2020_time.pdfIn PDF document text
    • https://cdn.sqhk.co/mapexovebo/hiep87n/buy_followers_and_likes_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/rujojumex/hedcigm/snow_storm_super_human_flying_ice_superhero_warning.pdfIn PDF document text
    • https://vojesegavosoza.weebly.com/uploads/1/3/0/8/130813146/sobekebi.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/ahgbl6O/comedy_animation_new_movies_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/kifukuvitog/jfanhge/fantasy_battles_figures.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/icii3QK/xikaporutij.pdfIn PDF document text
    • https://cdn.sqhk.co/giravopakiw/ic9CuOJ/nicki_minaj_net_worth_2009.pdfIn PDF document text
    • https://cdn.sqhk.co/nazalugewu/jcKgejc/dejumotenidesojexozu.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/9Lgigjb/safari_2013_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/ijgl1Zu/88614161724.pdfIn PDF document text
    • https://cdn.sqhk.co/jedugifaxido/gdOo1t0/vojelakozutadirijoduvov.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/FjbaiUb/tomuwetusumake.pdfIn PDF document text
    • https://fosegeluka.weebly.com/uploads/1/3/4/7/134717840/4f50a2.pdfIn PDF document text
    • https://cdn.sqhk.co/savujegu/iggOggm/424322230.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/Rjiihjb/81963178417.pdfIn PDF document text
    • https://ruputosara.weebly.com/uploads/1/3/4/4/134456906/kuvuwafake.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0eb57d06-7930-4c19-88fd-fb9c115be918/smart_watch_camera_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df42b489-cf0e-47b3-8340-08aacd769718/48148803637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f07066b-d3c2-44bf-9797-2ac7e39097d5/maytag_dishwasher_diagnostic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be78db8a-1fed-4a05-b827-880d36765093/how_to_clean_kitchenaid_architect_coffee_maker.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30A 5340 bytes
SHA-256: 47a90da325bc759d3cdb7f23dccfcf0c5f333dad1ad19058845352858f784dbf
font_01_sfnt_off0000e527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 10860 bytes
SHA-256: 836afa969cc64207ee4e3233169b211f1cbeb59e8631eb350f946498ef18f6ff
font_02_sfnt_off00010a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A64 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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