Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec2f8813046a015a…

MALICIOUS

PDF

84.3 KB Created: 2021-04-05 04:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 558d13ed93f60a40d76ccbb3229765d3 SHA-1: 6803aba9a58ca7c2d17c1961b260557da13cdcf2 SHA-256: ec2f8813046a015ac08223f8a2a5bcc01ad2b5f5384cb00bf1e87190a65f1e91
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a lure related to learning English fluently, which is a common tactic for phishing or malware distribution. It embeds external URIs, with a primary suspicious URL identified as https://midufefew.ru/strik. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or serving a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=how+to+learn+english+fluently+in+10+days PDF link annotation
    • http://kexedeziferu.sportsontheweb.net/classic_kitchenaid_mixer_cover_pattern.pdfIn PDF document text
    • http://motubudasuvapan.medianewsonline.com/blessed_assurance_my_king_is_coming_chords.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://novufojanaka.epizy.com/live_nettv_apk_4._6._1.pdfIn PDF document text
    • http://jomevove.epizy.com/jisenapabewosoderinub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae02ee4-07b6-4fe7-85f3-9e847eb461f8/can_you_still_buy_film_for_polaroid_land_camera.pdfIn PDF document text
    • http://kotalozobazad.rf.gd/80631381551.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_36b7ec91321b483e87ef4a2187df7cd4.pdf?index=trueIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_a3e37209035244dba77af1901222c78d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/levumoduf/large_format_self_adhesive_vinyl_printing.pdfIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_3c128100e74a434b82845276d6a7e2d1.pdf?index=trueIn PDF document text
    • http://tuguwobafadurot.rf.gd/nejiku.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/arabic_remix_fi_ha_video_songs.pdfIn PDF document text
    • http://fezabum.rf.gd/sotapugutovubijuzewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9e7e73-2396-484f-8913-c749f6c1f22f/how_to_sync_sony_mdr-xb50bs.pdfIn PDF document text
    • https://377d1c6c-8747-407e-9a0d-bb8234813250.filesusr.com/ugd/f0b1fd_4d5e772c9f2f48458d919b1653c4bd3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovilowab/ecclesiastes_12_study_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 5520 bytes
SHA-256: 86e5b790d73907dea565d151f98374836d775f17116c6f5f4ac3096006937141
font_01_sfnt_off00010a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A31 10716 bytes
SHA-256: 80ef0176e2f1c4a40e9a4773fa1fc97b85c6bea9ce057d662ee049f823c7fcd2
font_02_sfnt_off00012ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC3 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

Open this report in the interactive analyzer, or submit your own file for analysis.