Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc50a2a45281313…

MALICIOUS

PDF

71.7 KB Created: 2021-03-05 22:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 08229d943cacceed9e580920bc4ca896 SHA-1: 5610334cd52fce1fa369a88e4084d0deff125d03 SHA-256: 7fc50a2a4528131356e2e8ca6defcd68c35bc6c1d2ad6a0a45a1a95c4717fa05
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites, likely for credential harvesting or second-stage payload delivery.

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://leonvi.ru/wix?keyword=scientific+inquiry+worksheet+answers+key+pogil PDF link annotation
    • http://cleaner360.shop/1317489368kncxt.pdfIn PDF document text
    • https://mutolumikiwow.weebly.com/uploads/1/3/1/8/131872082/300615.pdfIn PDF document text
    • https://tariwina.weebly.com/uploads/1/3/0/7/130739483/zowuzekul.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/1UhbNh8/soccer_hero_hack_game_download.pdfIn PDF document text
    • http://perevod24-card2card.site/kerujefuxojusibeqdvtb.pdfIn PDF document text
    • http://forkidsshop.online/dead_cells_trainertw4r2.pdfIn PDF document text
    • https://mawosamaretezij.weebly.com/uploads/1/3/4/8/134860838/wuwewapawoxizemaki.pdfIn PDF document text
    • http://sayfelengs.space/is_chronicles_of_narnia_worth_readingeuh8x.pdfIn PDF document text
    • http://dimifepovez.22web.org/xipulefatijido.pdfIn PDF document text
    • http://datingdate.site/where_can_i_see_christmas_lights_in_houston_for_freemjw3v.pdfIn PDF document text
    • http://gratoraama.website/85628871497q6q98.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/IDhciI7/mysynchrony_car_care.pdfIn PDF document text
    • http://vuzosemeve.22web.org/popuselonegutajo.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/667f5c74-996d-4cd2-84b3-52d78d816973/counting_stars_drum_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d940049-3b36-4418-a28f-16535d759d3b/24536364016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949c137d-1565-412a-a60a-0fa1784ad6da/fezizup.pdfIn PDF document text
    • http://wonumamirevaz.rf.gd/55802509716.pdfIn PDF document text
    • http://kariwukopufemu.rf.gd/widuxiwisef.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_off0000ce03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE03 5648 bytes
SHA-256: ac0f1c2b57e4686e8ecf7a37590b06450f494f52963dc697a645472a5cbf0a6a
font_01_sfnt_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 9996 bytes
SHA-256: 02cbe31af32c1fce307c2f0aef05ccb64900859f1a7f787f99a43dce6fb58c3c
font_02_sfnt_off00010360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10360 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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