Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a40b97524b289a…

MALICIOUS

PDF

75.2 KB Created: 2021-01-11 06:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ad172911a49e92d38ee9079588d45797 SHA-1: e943b6f489e67d52257c1be07b90b486b805cf98 SHA-256: 26a40b97524b289a29e4b2c1a4ca1900d9c96f4fe610c8ca6f9025566ad1a12d
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating a PDF link farm and external URI usage. The document body, though partially corrupted, contains text related to a 'fighter super pocket bike for sale' and metadata from wkhtmltopdf, suggesting a lure. The numerous embedded links, including one to 'traffking.ru', point towards a phishing or scam attempt, potentially using the embedded links to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/123?utm_term=x22+fighter+super+pocket+bike+for+sale PDF link annotation
    • https://site-1176782.mozfiles.com/files/1176782/82794139163.pdfIn PDF document text
    • https://site-1168410.mozfiles.com/files/1168410/makrolon_ar_abrasion_resistant_polycarbonate_sheet.pdfIn PDF document text
    • https://site-1172235.mozfiles.com/files/1172235/weduxisisavinigekis.pdfIn PDF document text
    • https://site-1175908.mozfiles.com/files/1175908/zigivelumajakanibik.pdfIn PDF document text
    • https://nigupisotaku.weebly.com/uploads/1/3/4/3/134374455/9f6b204406f.pdfIn PDF document text
    • https://cdn.sqhk.co/xilelawemu/gjQijhe/pick_me_up_3d_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/nijalemivowo/GkZIje7/81404351345.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/how_to_turn_off_roaming_in_iphone_x.pdfIn PDF document text
    • https://site-1173349.mozfiles.com/files/1173349/shaq_smash_ball_gif.pdfIn PDF document text
    • https://bazubipevudupu.weebly.com/uploads/1/3/4/8/134876407/a97d6fbde8c.pdfIn PDF document text
    • https://site-1167928.mozfiles.com/files/1167928/66907327581.pdfIn PDF document text
    • https://site-1176876.mozfiles.com/files/1176876/looperman_royalty_free_beatbox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sisaxu/counting_worksheets_for_preschool_1-_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/pharma_guide_dahshan.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/gapukepeto.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/format_of_agreement_between_lender_and_borrower.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 5592 bytes
SHA-256: a5ad731a46e077474a544624ca4571c4fbe4064393a1d352b32622a581fd5432
font_01_sfnt_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 11864 bytes
SHA-256: 62736de6474ee513316ae4f3a541ed185f880ce77c708c8eaf9afba45e7e42ce

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