Malicious PDF — malware analysis report

Static analysis result for SHA-256 f69279d70b9d733a…

MALICIOUS

PDF

84.4 KB Created: 2021-09-16 15:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 177ba7b97ea8f36d7dd4129864469006 SHA-1: d32cfc2b3d0c022614ffcfc78ce9899bafe896d6 SHA-256: f69279d70b9d733af56eb15d8c84244b06ef70f3e40dde4a010b226f80688ecd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely leading to phishing sites or malware downloads. The embedded URLs, despite some being marked as benign, contribute to the overall suspicious nature, with many pointing to unknown domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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 http://sjzhtchem.com/upload/files/dilufegaximipabenuri.pdf In PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/41991008101.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/63756198918.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210904_E45EFD7B18BBB58F.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///konafuwutigazeb.pdfIn PDF document text
    • http://imaginove.eu/data/Files/bojod.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/14446891101.pdfIn PDF document text
    • https://aromamarketing.md/img/files/jotikalex.pdfIn PDF document text
    • https://mahae.hu/files/files/resen.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/xesugila.pdfIn PDF document text
    • https://huangs.tw/uploads/files/202109071920324782.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/64610901656.pdfIn PDF document text
    • http://shop-cartuning.pl/userfiles/file/48761281791.pdfIn PDF document text
    • http://vaynhe.com/upload/files/27068748595.pdfIn PDF document text
    • http://restavratorstvo.com/ckfinder/userfiles/files/xulozekato.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/50738473045.pdfIn PDF document text
    • https://ecoquimica.cl/dinamicos/uploads/file/pepuzezebeveku.pdfIn PDF document text
    • https://foodphotoshop.com/userfiles/files/96839299105.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/88715126176.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/xobepomu.pdfIn PDF document text
    • https://forumsevens.com/images/file/rixafonoxunutobumet.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/xesomekugikupopupo.pdfIn PDF document text
    • http://belean.pl/userfiles/file/raperabagafujovegadakegow.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/tekewino.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/tisinukexugesetikamon.pdfIn PDF document text
    • https://karpzbeldowa.pl/uploads/userfiles/files/50693571985.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+install+play+store+on+amazon+fire+stickPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE016 19188 bytes
SHA-256: e1a3da0d94b37ce09680bdfb8833f2fb04949bd505f29381b73b08a87e5dd3a5
font_01_sfnt_off000111bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BC 10984 bytes
SHA-256: 9fd5d31c7d153f5e4ea4387930e14059d4fe22aa104a5fdd05a82c3f6d64e8ec
font_02_sfnt_off00012b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1