Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e32a6681a4cc010…

MALICIOUS

PDF

70.0 KB Created: 2021-02-24 20:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 19cee678ffa52761e4bad7706cb2103b SHA-1: 23939f658b6a77dd00b1e0b58fda62199a67681a SHA-256: 0e32a6681a4cc010a71cf4236b6d651dfb4a89627433204e986de366f5472a87
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, with a critical heuristic identifying one URL as a known malicious redirector. The document's structure and the presence of many links suggest it's designed to lure users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/wb?keyword=bissell%20symphony%20pet%20steam%20mop%20parts In PDF document text
    • https://static.s123-cdn-static.com/uploads/4412593/normal_5fcfe85212870.pdfIn PDF document text
    • https://cdn.sqhk.co/puzukebejas/g1lIzJz/42090850002.pdfIn PDF document text
    • http://nesobaka3.xyz/faretobewesotiwosuxufitezjnn19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377642/normal_5ff4ceb942cdd.pdfIn PDF document text
    • https://cdn.sqhk.co/vudebalox/e7G2ia3/lobbying_synonym_in_urdu.pdfIn PDF document text
    • http://prosucre.pro/kitopokawazafubevarenupoqq9kz.pdfIn PDF document text
    • http://luminar2-download.xyz/111100706631alfh.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/keputalomab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5fe2982aa5f9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_602e773b4a959.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/jgjbgjP/tank_hero_laser_wars_mod_apk_download.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/sojaxub/aliexpress_old_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/fafesibamuzekapojolozud.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_off0000d580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD580 5212 bytes
SHA-256: ed75079713ffd4aeabe8f42a89367cfeceaec75cda48638a0d7e89a53f08ee98
font_01_sfnt_off0000e712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE712 10644 bytes
SHA-256: 26e050730f40deae1b7705afe4f946c01f36912896d1eb5e7cbe5208a7305cb7

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