Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34dc291c12d25df…

MALICIOUS

PDF

73.4 KB Created: 2020-12-31 04:29:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 37c2fb2a69fc5a242ff9f5cee0d220ce SHA-1: fb986049937d563f39967feda6a8ebfc59d96505 SHA-256: d34dc291c12d25df152908ff3afba327716458c1b246280c1db5cb71fad5e0a5
136 Risk Score

Malware Insights

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

The PDF document contains a high-priority heuristic indicating it is a phishing lure for a free download. The embedded URL, 'https://trafffi.ru/123?utm_term=download+torque+pro+full+apk+free', is presented as a download link for 'torque pro full apk free'. This suggests the document's primary purpose is to trick users into downloading potentially malicious software disguised as a legitimate application.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://trafffi.ru/123?utm_term=download+torque+pro+full+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fe96f989ce8f.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://s3.amazonaws.com/xuxifuzituwu/dicot_embryo_development.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/adverbs_modifying_adjectives_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/adjectives_that_start_with_an_b.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/corduroy_book_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/isotopes_of_hydrogen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73791a89-ba8e-4be4-8ada-36876143f6ff/game_banana_cs_1.6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41d24d91-e7ef-42a5-9385-e31df1736bbe/watch_avengers_endgame_hd_online_free_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/43412030195.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_off0000d489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD489 4972 bytes
SHA-256: cb4baf0f3ffd7cd14f889334e23f8ef4cb261f04834081d945ed74eea5b37826
font_01_sfnt_off0000e592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE592 10880 bytes
SHA-256: d5e2ca0b6e7e5995715651d78865409e5c490942507a006d4e0cfdc7525ec360
font_02_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333