Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccc64c40a1728a0…

MALICIOUS

PDF

98.5 KB Created: 2020-12-20 19:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aab05eb1453b5b0b76ba92fa2ae3c5d4 SHA-1: 18e86bd699965c88fa1066f111c2fc0f7072a4ac SHA-256: 3ccc64c40a1728a0fa6a6045b9a75f96a2acd12930f5ba49117fbfd20659ef2d
252 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file contains numerous embedded links to external PDF documents hosted on various disposable domains, indicating a link farm or SEO manipulation scheme. One critical heuristic identified a link to known malicious redirector infrastructure, and ClamAV detected the file as a phishing trojan. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/aws?utm_term=aha+guidelines+carotid+endarterectomy In PDF document text
    • https://josugonu.weebly.com/uploads/1/3/4/4/134488469/5338977d86d6.pdfIn PDF document text
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/ccda01fcf9ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417049/normal_5fb6028e80383.pdfIn PDF document text
    • https://mupaxezofede.weebly.com/uploads/1/3/4/3/134317166/9e64cd58.pdfIn PDF document text
    • https://xarefiliji.weebly.com/uploads/1/3/4/7/134735925/86150742d.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/57df76f20942.pdfIn PDF document text
    • https://kepupumi.weebly.com/uploads/1/3/4/6/134616340/8008001.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476569/normal_5fc8340c121f5.pdfIn PDF document text
    • https://kapegidaboxisi.weebly.com/uploads/1/3/4/5/134527108/758661.pdfIn PDF document text
    • https://togimapobeno.weebly.com/uploads/1/3/4/6/134649298/5043523.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f8d29d5ebfb2.pdfIn PDF document text
    • https://sekatuxu.weebly.com/uploads/1/3/4/8/134894727/dugirusanop-vutuvefobafi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c2a94baf-7f7e-4666-9e74-7cc15b78d77f/departed_shipping_up_to_boston_mp3_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/pomotu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134F0 5324 bytes
SHA-256: 509bf00b7439d99879a11fe88359a255d2da12d07a94a1cfeec94ba51b14eb21
font_01_sfnt_off000146dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146DC 11672 bytes
SHA-256: 972901129ef12b283842cd7b66f2d55bed59f1ab8c7f65c75f13c199d306cac1
font_02_sfnt_off00016e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E5B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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