Malicious PDF — malware analysis report

Static analysis result for SHA-256 61e39e213c51a8bf…

MALICIOUS

PDF

74.8 KB Created: 2021-09-17 23:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ead311d4c22fe6c183f93cf300cc56f9 SHA-1: 7bd797c13a252baf279f87c8560a12be91c07d81 SHA-256: 61e39e213c51a8bfa3af6200aa647c951da347e3289dd51d2cb182c58f12b4d2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The presence of these links suggests the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7434

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
  • 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://toflight.mobi/attachment/ckeditor/files/69604a50b912198eec17676b626f3148.pdf In PDF document text
    • http://wingtsunkungfu.ro/imagini_ws/zakomisufazun.pdfIn PDF document text
    • http://lecostationery.com/files/file/wetini.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/99147173032.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/pozuvofepevalajalatuzuriz.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/43587159901.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/woruteve.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/xizelato.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/33490152819.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/62007659864.pdfIn PDF document text
    • http://yuhenganquan.com/userfiles/file/20210912032004_1572404128.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/41121140773.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/vamazagidataxotufiwovo.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/86280491870.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/3854593462.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/93926502252.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/43932052215.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/tipopafenejade.pdfIn PDF document text
    • http://tehnicgaz.eu/files/file/69606536950.pdfIn PDF document text
    • http://dgkno.cn/upload/11576758035.pdfIn PDF document text
    • http://altinay-law.com/images/file/wevozasekidu.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/zikidobeparitizum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=fifa+12+android+reviewPDF 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_off0000ca70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE287 10336 bytes
SHA-256: 34edf6b178a208de325197f72a4763666a53df9356c7d36d2b1cb5d3bb2f7a02
font_02_sfnt_off0000fa06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA06 19136 bytes
SHA-256: 2487be443a7e2f6787a002a5a4768b538b53d29c8b6a6a5a0a82905e7bc004b3

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