Malicious PDF — malware analysis report

Static analysis result for SHA-256 476082c320272891…

MALICIOUS

PDF

67.6 KB Created: 2021-01-16 15:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 88956d4b18c08ff6a06cdc2c45e60f05 SHA-1: d6af05ac82d80a66d063e22cd30b6fb61ea63d8e SHA-256: 476082c32027289145d7ee4a36dfeaf03c0a7c5609134cdbae5d1e9186f1a569
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, "https://trafffi.ru/aws?utm_term=remove+bios+password+asus+transformer", suggests a lure to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9705

Heuristics 4

  • 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
  • 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://trafffi.ru/aws?utm_term=remove+bios+password+asus+transformer PDF link annotation
    • https://site-1174404.mozfiles.com/files/1174404/arsenal_top_scorers_premier_league_19_20.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/fnxicjd/ge_universal_remote_control_codes_for_vizio_tv.pdfIn PDF document text
    • https://site-1178414.mozfiles.com/files/1178414/3006340300.pdfIn PDF document text
    • https://site-1168287.mozfiles.com/files/1168287/origami_halloween_crafts.pdfIn PDF document text
    • https://site-1175246.mozfiles.com/files/1175246/active_to_passive_voice_converter_apk.pdfIn PDF document text
    • https://winomexixuz.weebly.com/uploads/1/3/4/6/134621408/2578014.pdfIn PDF document text
    • https://site-1172851.mozfiles.com/files/1172851/8_slices_menulog.pdfIn PDF document text
    • https://site-1084368.mozfiles.com/files/1084368/pottery_barn_classic_velvet_stockings.pdfIn PDF document text
    • https://site-1168031.mozfiles.com/files/1168031/61703347975.pdfIn PDF document text
    • https://site-1177793.mozfiles.com/files/1177793/pixel_swordfish_io_cheats.pdfIn PDF document text
    • https://site-1224368.mozfiles.com/files/1224368/decadry_cd_label_template.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/iaS0YI4/download_prop_hunt_portable_mod_apk_android_1.pdfIn PDF document text
    • https://site-1212380.mozfiles.com/files/1212380/aqa_chemistry_a_level_equation_sheet.pdfIn PDF document text
    • https://site-1176302.mozfiles.com/files/1176302/duwikelikodedilepeme.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/kozokedesurowilebab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 5456 bytes
SHA-256: d13519ba6af8058faaa7aefe114658cedcd0698e574db463b72731aa2ef5fd97