Malicious PDF — malware analysis report

Static analysis result for SHA-256 4049e1828019a39d…

MALICIOUS

PDF

87.4 KB Created: 2021-03-10 06:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c93b1062192f1312a204b273f996ab4f SHA-1: 2b85bd4b05c187e7a25b8306b08a82871847611d SHA-256: 4049e1828019a39dda3ca90cee24edf9720199497345046d7c58cc27d669b8ec
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself is designed to facilitate malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/award?keyword=afro+blue+lead+sheet+pdf PDF link annotation
    • http://motorutovibipe.sportsontheweb.net/24115586844.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/jahjcha/57896330957.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/abbyy_transformer_full_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/daribugubive/cpifvck/fall_guys_game_trophy_guide.pdfIn PDF document text
    • http://kmplitka.shop/8699214332qf2lm.pdfIn PDF document text
    • http://voiprormul.xyz/rifuwamoaajv2.pdfIn PDF document text
    • https://jatekowi.weebly.com/uploads/1/3/0/7/130776123/189cc.pdfIn PDF document text
    • https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/limibifuxoj-vefowopex.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/bwwEYr9/gevonunopodasozutusi.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/hgxiavl/watermelon_vodka_jelly_slices.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/32579015297.pdfIn PDF document text
    • https://cdn.sqhk.co/tuvameboroke/ahdhxgj/jaxodovedakujokazovokame.pdfIn PDF document text
    • http://streichpack.online/22867640739oxl7q.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61cc9cd4-4477-43e6-bd1a-f580558e52af/xbox_one_controller_rechargeable_battery_pack_not_charging.pdfIn PDF document text
    • http://xugomoxuniwemo.rf.gd/beira_alta_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b41602-cdc3-4826-9d09-0b547414104b/charlie_and_the_chocolate_factory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f800ef-c656-4e71-a658-1ec91805d376/3002853629.pdfIn PDF document text
    • http://munoxefarofow.rf.gd/17486137900.pdfIn PDF document text
    • http://bapomel.epizy.com/87538169440.pdfIn PDF document text
    • http://wosaxadef.rf.gd/2141843282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434ef6d3-95b2-4fc8-9fe4-91573b89cd1c/how_do_you_change_a_battery_in_a_stauer_watch.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/bekezat.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_off00010356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10356 5256 bytes
SHA-256: e3efa0531fda1b372b3074c0ebaa6819a37628f72c5379af2d48669237b8c10b
font_01_sfnt_off00011532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11532 11424 bytes
SHA-256: 6a561a47a48d1a08def0558aba330c926365336d286d1bab731c31eb339f41a0
font_02_sfnt_off00013aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AA0 16200 bytes
SHA-256: 9527d77a8ddbff7143f4b9d9ffa6a9c0a17c14fbd864be9d9139927b2451880e