Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ea77a66f60c1f5…

MALICIOUS

PDF

88.4 KB Created: 2021-03-16 00:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e43134377b0e2882d5b82c82ff726f4 SHA-1: b3acf3b1c77eeaaa011f977ae491892c84f07ed6 SHA-256: f1ea77a66f60c1f53358b0b7d15d3b6d9138901977f58e85c633ea7d5c8ec325
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 point to potentially malicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious sites for further compromise.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=manuale+istruzioni+polaroid+snap+touch
    • http://55571.ru/154119295003llhy.pdf
    • https://cdn.sqhk.co/vixuzemabad/bLhfBge/29372866884.pdf
    • https://cdn.sqhk.co/bokapapukopa/Aqicugg/dog_fighting_statistics_in_the_us.pdf
    • http://arevakar-travel.com/mine_engineering_courses_in_australia7mlvm.pdf
    • http://marafonsport.site/how_do_i_get_an_iatf_certification3vmta.pdf
    • https://cdn.sqhk.co/koxixoneto/ia9hcw2/pandemic_legacy_board_game_review.pdf
    • https://cdn.sqhk.co/wexovezojab/EEjgkgd/medieval_warfare_grimes_mp3.pdf
    • https://cdn.sqhk.co/wolanojijen/jbhaogd/asus_rog_crosshair_viii_dark_hero_release_date.pdf
    • https://cdn.sqhk.co/lokatatape/hhDmCN0/3d_chess_game_for_mac.pdf
    • https://wotifugif.weebly.com/uploads/1/3/4/2/134265354/8c95e6a73244b.pdf
    • https://pemugaladesav.weebly.com/uploads/1/3/5/3/135307247/6448984.pdf
    • https://cdn.sqhk.co/xarozowuzosa/tBjdIoT/servers_for_minecraft_pe_1._14_1.pdf
    • https://cdn.sqhk.co/ranemagesoga/5o8jggg/vizerad.pdf
    • https://kelogukagikuval.weebly.com/uploads/1/3/0/7/130739039/gilovulagugimu_kumifugozat.pdf
    • http://kellys.space/891145921451kgjy.pdf
    • http://lavkavkusa.store/architectural_photography_principles5mxn1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/39efd214-7b0c-4fd7-ab26-d51f6318a1da/what_is_importance_of_technical_writing.pdf
    • https://uploads.strikinglycdn.com/files/86e02b0d-c5e5-4af5-8a27-621ec08e25c1/xiguxebeponaxatopewanoxas.pdf
    • https://uploads.strikinglycdn.com/files/8ef76eed-4d95-4375-82ae-676fefece024/skyrim_special_edition_skyui_not_loading.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111d6.bin
be01ab31cb2d0d15db494a89819d187ca904140fda80cd3f630cf864829e5177		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111D6 5216 bytes
font_01_sfnt_off000123a0.bin
50e0792b3840d2ad7e8e0c1672bf1cf468749c92c47350ec237325f6fbe2a717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123A0 16260 bytes

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