Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6380cfa23acece…

MALICIOUS

PDF

90.9 KB Created: 2021-04-05 05:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 536021ddfc431de0176cb5bcb42c3b6b SHA-1: 2a3ba10e4398cb34a896f4f70aa926784a8bf359 SHA-256: 0d6380cfa23acece833a94846ebe20c66bdd3156520c55323e1415b12b4fd682
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with one prominent URL leading to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/wix?keyword=can+you+adopt+a+khajiit+child+in+skyrim
    • https://cdn-cms.f-static.net/uploads/4482426/normal_605efe9321c66.pdf
    • https://cdn-cms.f-static.net/uploads/4491451/normal_5fe93247754e5.pdf
    • https://cdn-cms.f-static.net/uploads/4385011/normal_5fda3aa03bdb5.pdf
    • https://cdn-cms.f-static.net/uploads/4378608/normal_5fda03c86b0f3.pdf
    • https://static.s123-cdn-static.com/uploads/4420430/normal_5fe45cb588640.pdf
    • https://cdn-cms.f-static.net/uploads/4480579/normal_601cccc6c5732.pdf
    • https://static.s123-cdn-static.com/uploads/4473056/normal_5fc67b5882cd2.pdf
    • https://cdn-cms.f-static.net/uploads/4401525/normal_6028e1cad0096.pdf
    • https://cdn-cms.f-static.net/uploads/4452161/normal_6052a82d59dc1.pdf
    • https://cdn-cms.f-static.net/uploads/4491148/normal_602bde462ac14.pdf
    • https://cdn-cms.f-static.net/uploads/4453720/normal_5fe7c7ad1157f.pdf
    • https://cdn-cms.f-static.net/uploads/4403556/normal_60146ee295736.pdf
    • https://cdn-cms.f-static.net/uploads/4408995/normal_6014b7c2898a3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://s3.amazonaws.com/vovopafubipu/blog_templates_2019.pdf
    • https://1c437d0a-cccb-4a8a-93f1-39e0b5126915.filesusr.com/ugd/b91566_eae1fc06f5a9450c8ff27863fdef428d.pdf?index=true
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_5b8fb92d1c3a45e8af443cf9f1f67d8b.pdf?index=true
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_7bb1bf663a90494f9f34c56d11f4cecd.pdf?index=true
    • https://s3.amazonaws.com/wutisigila/87974968643.pdf
    • https://s3.amazonaws.com/labitajaxatufib/dugetaxobirikavisiv.pdf
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_652490aa000b4d30add2c0efa49bc283.pdf?index=true
    • https://96a604d4-6f4e-42dc-90fb-b802e1cf4ed0.filesusr.com/ugd/6ef60c_ce7bc4cdcd504e3c9aba6b02c2f0c2fe.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed29.bin
2dd33f2c89cb5b61ab4cf79dc6d1b96eea380a3dea4dc04c82927a2cb71653b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED29 5824 bytes
font_01_sfnt_off00010147.bin
487daea8f7754033e00fa8e98563682c9d96ad6b72a10b5a6cb976f038f8d538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 5460 bytes
font_02_sfnt_off000113bb.bin
c126883ad4d9b847e00bf1d8e0402d0a6fa4b7d27b9bb3f9f854b41107ef76a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113BB 10664 bytes
font_03_sfnt_off00013845.bin
a6c2d3392a5cbb019b469a94c3ad8dae7281bfc6835362d900146a66ab5ad606		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13845 17540 bytes
font_04_sfnt_off000152b0.bin
c7537b8c885432f017164b8e7d23df3498bfcce41991c06cc4a134d408215231		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152B0 2572 bytes

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