Malicious PDF — malware analysis report

Static analysis result for SHA-256 07feeaf3553eb6d2…

MALICIOUS

PDF

72.2 KB Created: 2021-02-14 22:05:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ff24b850e2c3e1874e26b507d7a93181 SHA-1: 20ae67e1abf6abd5acbf51fc3c438030ad46b94b SHA-256: 07feeaf3553eb6d230020d1d53aa06ff5820aeebc60b808511c09ebd2f7b3a8c
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded URLs that redirect to known malicious infrastructure, suggesting it is used for phishing or distributing further malware. The presence of multiple disposable domains and redirector links points to a campaign focused on evading detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=d%2526d+gold+to+silver In PDF document text
    • http://usblighter24.site/aqualung_titan_manual35w86.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/0icLOjh/kafatonevojixobudagesa.pdfIn PDF document text
    • https://cdn.sqhk.co/koluvukirate/yidjhy1/slime_pizza_wiki.pdfIn PDF document text
    • http://graatorama.space/37200194062u5akf.pdfIn PDF document text
    • http://souve.me/adorno_negative_dialectics0l03c.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/toronto_fun_guide_registration_dates2tiha.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/ghic3by/jak_daxter_lost_frontier_ps2.pdfIn PDF document text
    • http://rte-ita.fun/746035529834ao5p.pdfIn PDF document text
    • http://takipleskazan.org/58522012407scy56.pdfIn PDF document text
    • http://nikaold.site/breathable_groundsheets_for_tentsp5nyb.pdfIn PDF document text
    • http://disconto50.pro/collier_county_beach_red_tide_reportmkud6.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/xakapudakadu/93756994418.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/84684610506.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/bizejakejuzo.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_off0000e269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE269 4156 bytes
SHA-256: 58eabb24298f18ab3cb5c3f3a5652a185830994b36fd37cd9ad46fcf77495092
font_01_sfnt_off0000f098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF098 10572 bytes
SHA-256: 8569eb149cbdd6d7edaa077128b65d2318c2756e8531d31a6325341cbffcb295

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