Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df69f4b62be5656…

MALICIOUS

PDF

67.8 KB Created: 2020-12-23 23:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eb065043fceeab56738425dd0f82e8d6 SHA-1: 393d8005628ae4d87b5657c45402ccb5c9ea9ede SHA-256: 2df69f4b62be5656be29291fdb8861656f7961ca5e7bbec315c16c4dbc094af3
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, appears to be a lure related to a fishing report, which is then redirected to a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://trafficel.ru/aws?utm_term=quail+creek+state+park+fishing+report PDF link annotation
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/rupotujaduzikij.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/yiegeid/game_show_buzzer_for_sale_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/mewidexe/AihjauU/kumusotofalenirinekizin.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/76c30d49.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/jhhiiaI/shipwreck_cove_spray_park_2020.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/nesipa-lixusajevu-bezebibuzoxim-xojaxibatol.pdfIn PDF document text
    • https://zisikokemebekus.weebly.com/uploads/1/3/4/2/134235681/9112534.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/UAJijuK/transmission_repair_shops_in_jacksonville_fl.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/rigupom.pdfIn PDF document text
    • https://ronizizuvuf.weebly.com/uploads/1/3/4/7/134707383/lokaz-tetefopoga-werinevolaze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419001/normal_5fced9952faa9.pdfIn PDF document text
    • https://pegepefip.weebly.com/uploads/1/3/4/4/134455730/5016535.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/jupudizadid/formal_letter_writing_samples_with_question.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/baidu_browser_xp_free.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/60624918974.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_off0000ca41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA41 5404 bytes
SHA-256: abd67ade4276e65c02bacc7f640173ec60a3680523805f3665406e825518c68c
font_01_sfnt_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 11092 bytes
SHA-256: 4a8f3e91b317c5d6440e91c3a9974665d79f932c24201760a0440274e7065a86

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