Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e84e9f4b44f34e…

MALICIOUS

PDF

73.4 KB Created: 2021-05-24 02:17:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 549a72be366142758c82e3d5f05b57e6 SHA-1: 24622e59be814b6cf0467cb34f13bf5ed560bee9 SHA-256: 69e84e9f4b44f34ea37e4be4026bcbf828298b0399b84822c85eddfee1c654c8
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common technique for SEO spam and traffic redirection. One prominent URL, 'https://maypoin.ru/strik?utm_term=mercedes+benz+c+class+user+manual', appears to be a malicious redirect. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded links suggests an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://maypoin.ru/strik?utm_term=mercedes+benz+c+class+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451544/normal_602290e7d52d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_606c14aa56fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_604d809614705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503525/normal_600a469da3c7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_600f1f0a4012c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_604161b100211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481676/normal_601cba2b1e53a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_6023ec6156d83.pdfIn PDF document text
    • https://zefinefan.weebly.com/uploads/1/3/2/8/132816158/3188686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480749/normal_6010d8dc008e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_603c27b5660d9.pdfIn PDF document text
    • https://mapazudisobamun.weebly.com/uploads/1/3/4/6/134604154/3468151b5a5516a.pdfIn PDF document text
    • https://vetebifarex.weebly.com/uploads/1/3/4/0/134016991/lewaboroti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_6056e64415c29.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://s3.amazonaws.com/batiku/gambler_seal_online_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/84107038703.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/answering_phone_jobs_in_toronto.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/91430926841.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/dinner_s_ready_word_ladder_answers.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_off0000d07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07B 4924 bytes
SHA-256: 7753d4cb5559dbf76eee2cad52576fc15a9000a556f01707d559a32be1760667
font_01_sfnt_off0000e11c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE11C 12780 bytes
SHA-256: 02104dbe0d599826583d1623f0bcbcfac8ac9ec51e70d4906d6e0d3b082a0f2e
font_02_sfnt_off00010a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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