Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc090e69e54c671…

MALICIOUS

PDF

74.2 KB Created: 2021-05-29 05:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 28909667edb1934e25596f8c53f6c60c SHA-1: 2eb663d34557f6591ca3694619d870fd8d3313a7 SHA-256: 3cc090e69e54c6713fe348176d5eae18469ae1a2da148a7c6d54218eb76891af
194 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect the user to a malicious site or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/123?utm_term=bombay+tamil+movie++kuttyweb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409425/normal_603ab89296698.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450042/normal_5fdfa00640d0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491437/normal_5fcb090e78735.pdfIn PDF document text
    • https://runebipunozup.weebly.com/uploads/1/3/1/4/131406604/6651588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_6009c943ad599.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420476/normal_5ffa35910d607.pdfIn PDF document text
    • https://visegonikagade.weebly.com/uploads/1/3/4/6/134626066/zasabiwarerub.pdfIn PDF document text
    • https://paxixikepidak.weebly.com/uploads/1/3/4/6/134666626/d7b0046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_5fd3775987d16.pdfIn PDF document text
    • https://zoxujaratufopa.weebly.com/uploads/1/3/5/3/135399722/de1f030506c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382638/normal_601ef54015090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489848/normal_5ffd87b6b8ef3.pdfIn PDF document text
    • https://pepazosek.weebly.com/uploads/1/3/4/1/134108786/7435491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_5fe9bb1cd297c.pdfIn PDF document text
    • https://migowixapim.weebly.com/uploads/1/3/4/3/134317861/3369874.pdfIn PDF document text
    • https://ribijiwazafi.weebly.com/uploads/1/3/4/8/134881841/3064882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5fe9084feef4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_606a539595e7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473379/normal_5fd64b6fdad40.pdfIn PDF document text
    • https://xikodixugab.weebly.com/uploads/1/3/4/7/134707070/633d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490129/normal_60417eacb0ecc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493195/normal_5ff756edc5f73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416331/normal_601c66e086705.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
    • 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_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 4840 bytes
SHA-256: a098226e1204fbacfd9132a0c99085542520b1dedbe28808fe8ffb7a3c73617d
font_01_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 11216 bytes
SHA-256: 8460e30ed010238bd92e694d62c77b27f383440c90a224e8ae63abb2456718f9
font_02_sfnt_off00010d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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