Malicious PDF — malware analysis report

Static analysis result for SHA-256 50717de6946a6593…

MALICIOUS

PDF

72.6 KB Created: 2020-12-24 21:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6548190312eea705ded8f19f5338a22d SHA-1: 944466cbc2515e78d9d5d0ce0c67aab26e0b8383 SHA-256: 50717de6946a6593e26165364c4f29b0984061b93640d6bb9c5bb0e8e13a5019
244 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable hosting services and redirector infrastructure. This behavior is indicative of a link farm designed to distribute malicious content or lead users to phishing sites. The presence of a critical heuristic firing for malicious redirector links and ClamAV detection further supports this assessment.

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
  • 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 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.
  • 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://traffmen.ru/aws?utm_term=arrondir+google+sheet In PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/e8e3d46.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/fhd7jcz/multiplayer_for_minecraft_pe_mod_apk.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/cac227909fa135.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/jicjj0y/pobawuzujomafi.pdfIn PDF document text
    • https://wazaxilam.weebly.com/uploads/1/3/4/7/134726650/9263132.pdfIn PDF document text
    • https://kakijukiwobak.weebly.com/uploads/1/3/4/3/134322026/980e4c153fc.pdfIn PDF document text
    • https://jezasowafinam.weebly.com/uploads/1/3/4/5/134530254/tofilufaneje_rekivelazupe.pdfIn PDF document text
    • https://noxatedigijo.weebly.com/uploads/1/3/4/6/134660841/3001086.pdfIn PDF document text
    • https://gepumisi.weebly.com/uploads/1/3/4/5/134517510/3274221.pdfIn PDF document text
    • https://walinakonefal.weebly.com/uploads/1/3/4/3/134316097/mazufonutawumofadox.pdfIn PDF document text
    • https://tajonerimokop.weebly.com/uploads/1/3/4/8/134879789/gokafa.pdfIn PDF document text
    • https://febawamowezifu.weebly.com/uploads/1/3/4/5/134594075/1f282b.pdfIn PDF document text
    • https://gexumuvebevo.weebly.com/uploads/1/3/4/3/134312536/kojutorawaxefijeri.pdfIn PDF document text
    • https://bimebupeku.weebly.com/uploads/1/3/4/7/134715010/8098310.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaae8dc9-3acd-40aa-b019-cb4a38cb5448/11222719928.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_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 4868 bytes
SHA-256: ff435ed5242209c95c2bd401583ced50e008942ac029225ede85451381a9e8df
font_01_sfnt_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 10580 bytes
SHA-256: bc6c40404a83475c514cd28bf4f3203ff7a7e98767abbc73bbf421ec745e29f8