Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8181c4ba4699602…

MALICIOUS

PDF

42.2 KB Created: 2020-10-29 01:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b02a4a4934d47c02dda0941582fd4855 SHA-1: 9f63f6e102ab051d6c584e0aa1121a332af2c6e2 SHA-256: b8181c4ba46996021dd6eef296ca4a0989baa7e814d5319cdc803741e55e54cd
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or redirector infrastructure, indicating a link farm designed for SEO manipulation or to distribute malicious content. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. While no scripts were explicitly extracted, the nature of the embedded links suggests an intent to redirect users to potentially harmful sites, likely initiated via a phishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ggtraff.ru/pify?keyword=renegade+meta+pro-trial In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f954127519e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f896f5bda4b9.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/1392291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f8d08d45159d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f888c7addb16.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/rovafexedesu-wemuvusivipame-vabizeguduves-bexawakovelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f99276e7cd09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_5f963a0284135.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/taravupudadademo.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/143770975051109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f87410fe5936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382781/normal_5f9893a50ce44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f8a96286bed1.pdfIn PDF document text
    • https://kilunifogewawo.weebly.com/uploads/1/3/4/4/134457757/599050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f8fa9af61379.pdfIn PDF document text
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/1465301.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/kavitokolezub/55132508100.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/see_the_able_not_the_label_copyright.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/2837452498.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_off0000683e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x683E 5140 bytes
SHA-256: 4b6137e94f042655edecb9b7f69c2551c80e1394ec2fb35efe317c68d58ec1ea
font_01_sfnt_off000079ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 10056 bytes
SHA-256: 0b38716e3e678699529f5ac0b4390ef7b23ec3e5fe87bb3636510ad777d2142b

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