Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d10ff4e0a718584…

MALICIOUS

PDF

92.1 KB Created: 2021-01-16 03:31:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b66898d6cfd1aac0db1132adef2b4649 SHA-1: 1c3ad0f959affaa546e59d9ed6e78edd4c9f5461 SHA-256: 5d10ff4e0a7185845c18d5abccc18eb7cec1c90dba96f5f3526fd7888019ea13
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic further support this assessment, pointing towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://trafffi.ru/123?utm_term=south+african+armored+car PDF link annotation
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/mukovotonewom_ruvupefazuj.pdfIn PDF document text
    • https://site-1177382.mozfiles.com/files/1177382/battle_of_alberta_hockey_fights.pdfIn PDF document text
    • https://vokewubepil.weebly.com/uploads/1/3/4/4/134443825/zelobijawawirazape.pdfIn PDF document text
    • https://napufifibadabe.weebly.com/uploads/1/3/1/4/131406817/2633362.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/fibaxizimudez.pdfIn PDF document text
    • https://fajasorefasox.weebly.com/uploads/1/3/4/3/134348900/lotipo.pdfIn PDF document text
    • https://furevevesegino.weebly.com/uploads/1/3/4/6/134653878/maferevaz-xibotuzi-radoba.pdfIn PDF document text
    • https://sejesomizibiji.weebly.com/uploads/1/3/5/3/135346687/2349ee8.pdfIn PDF document text
    • https://xiduxerajul.weebly.com/uploads/1/3/4/6/134696605/wekavapatuw_wotefamerit_lenalole.pdfIn PDF document text
    • https://majemuxisirilud.weebly.com/uploads/1/3/4/7/134719568/wulebura-medesitixex.pdfIn PDF document text
    • https://rokotejipap.weebly.com/uploads/1/3/0/8/130814190/2150973.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/lukepepe/yokai_tamer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/bomb_squad_hard_mode_unlocked_apk.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C3 5152 bytes
SHA-256: 1f75356428b4fdbfe7a9c89dcf8d0be752f14b1ca8f42f173aed874bc627ce13
font_01_sfnt_off00013523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13523 18880 bytes
SHA-256: 9fbb57c348cf89df2b66e289b8513ca2f1e8d465b8de2cfe62adc0dc9a50d796

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