Malicious PDF — malware analysis report

Static analysis result for SHA-256 6877e2b6bdc71fc0…

MALICIOUS

PDF

84.5 KB Created: 2021-03-23 00:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd773cd882fed9cf42857ebb7a2f301e SHA-1: e72a816d2ccc15a9fc9c94f8b45397145b948fe1 SHA-256: 6877e2b6bdc71fc0f95fbe721d0ce380bc9ca1b0162c36c7347218328f375840
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains numerous external links, forming a link farm, and the embedded content suggests a lure for fake Burger King vouchers. The presence of external URIs and the link farm heuristic indicate an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=burger+king+gutscheine+pdf+august+2020
    • https://fobanuvoba.weebly.com/uploads/1/3/1/6/131637247/19b25.pdf
    • https://relujebaxarun.weebly.com/uploads/1/3/1/1/131164257/mijidosoburujal.pdf
    • https://cdn-cms.f-static.net/uploads/4411931/normal_602d4a19dcd2d.pdf
    • https://dofazodasi.weebly.com/uploads/1/3/0/8/130873943/suranow_wezirufow_xebotekikom_dalujotobaxejes.pdf
    • https://semizomemakov.weebly.com/uploads/1/3/0/7/130739936/gavikomiliwo-sixoronob.pdf
    • https://nosilagime.weebly.com/uploads/1/3/4/6/134613039/gidobe.pdf
    • https://milorali.weebly.com/uploads/1/3/5/9/135965765/sevipurutaguku.pdf
    • https://napaxivate.weebly.com/uploads/1/3/0/8/130813999/39cc234.pdf
    • https://static.s123-cdn-static.com/uploads/4368493/normal_6001e5e2e1311.pdf
    • https://tepimetasufiro.weebly.com/uploads/1/3/4/0/134012902/50c27f3.pdf
    • https://rovinimowi.weebly.com/uploads/1/3/4/6/134682499/9182553.pdf
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/6228469.pdf
    • https://sujofunipus.weebly.com/uploads/1/3/4/5/134502209/kunolivovatisasavava.pdf
    • http://nickned.me/botekatovi5pr5p.pdf
    • https://medivurufif.weebly.com/uploads/1/3/1/4/131407406/39da905d9.pdf
    • https://tepukijamuboze.weebly.com/uploads/1/3/5/3/135301813/e4de1c.pdf
    • http://inter-kalinka.ru/broadchurch_netflix_parents_guideb7xrq.pdf
    • http://hightrade.club/ladufikowoposatulebiveladvndzv.pdf
    • https://litirovedogamat.weebly.com/uploads/1/3/5/3/135393382/32fc19.pdf
    • https://static.s123-cdn-static.com/uploads/4421641/normal_5ff253f8c1588.pdf
    • http://babysampler.com/68243798935bfk8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e650.bin
ffaec82604d34c64ead1ea22e39d515bcddc48af29b90d6621d10bbe2c6ac963		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 5544 bytes
font_01_sfnt_off0000f92d.bin
7f5da1f83098653df6b3e619ce7afbb5e684e078de1abe0aec3b0a663d1e0cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF92D 12000 bytes
font_02_sfnt_off0001210a.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1210A 16204 bytes
font_03_sfnt_off00013638.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13638 4324 bytes

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