Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0da8843d6da0ad…

MALICIOUS

PDF

79.8 KB Created: 2021-09-24 04:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1c30edab09ff08c58c8aab7b13ae019c SHA-1: 9a61f03f86627edd3a549db37bf6dc663d46d9e2 SHA-256: 2f0da8843d6da0adf38a42fd5d90561d4a058993dd74e0f11a1eddd7db7d86a4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as a link farm designed to redirect users, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5916

Heuristics 5

  • 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 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://szentdorottyapatika.hu/files/soforepuzatijuda.pdf In PDF document text
    • http://www.radio-kum.si/data/files/dipukawagidefawuriwobetig.pdfIn PDF document text
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/72628051058.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/rajogejemabukitapoxukewej.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/51209091512.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/66850323091.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/32556986312.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/depug.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/96284304595.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/zepaxaxifubire.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/womunabarajuboresujudib.pdfIn PDF document text
    • https://www.acta-mobilier.fr/ckfinder/userfiles/files/kozadupoda.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/161487f0ccb30e---woxolisoki.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/v0a0dl28hpirklsliqbdlhk50q/rovametamimalofelubig.pdfIn PDF document text
    • http://pescepiana.eu/userfiles/files/biwitidoletofonuxaponito.pdfIn PDF document text
    • http://fbrasil.com/userfiles/file///jomaraxelufawu.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/6831389167.pdfIn PDF document text
    • http://futsalcb.cz/picture/vtextu/file/22172129234.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/10721488790.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/wumidutelorimel.pdfIn PDF document text
    • http://maxbrio.kr/files/files/zefadoxatadeg.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/fezeweroremol.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210910160734.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109061846333521.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/nudaxubaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=fifty+shades+of+grey+2+full+movie+freePDF link annotation
    • 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_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 19772 bytes
SHA-256: b4eb0e7c7a64bee93c416a32258c55c30e44771c931723d9050544977d2951bc
font_02_sfnt_off00012277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12277 11076 bytes
SHA-256: eabc1d4b34b2b586174b3ef6ec7d8888a13d7cb38797a0de92b77b1c68dfe00c

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