Malicious PDF — malware analysis report

Static analysis result for SHA-256 57faabebe3317e61…

MALICIOUS

PDF

84.6 KB Created: 2021-09-17 00:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0bac84e3f6b71a2a5dc5abc394996a58 SHA-1: 353572ce1249f0cc5268156f7d6649fa631dc867 SHA-256: 57faabebe3317e61e66983b221b0b1026e4b6f6228bea9b90e66dad586e479be
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous links, some pointing to WordPress upload directories, suggests an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/cce2db5484ae7455ff60d1c8e71aeb9e/todizetudimaxofibijew.pdf In PDF document text
    • http://contextuae.com/resimler/files/29056092146.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/fonolitutalenexolo.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/62045542749.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/41297038307.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/59546912091.pdfIn PDF document text
    • http://unewstoday.com/task/userimages/file/76774261610.pdfIn PDF document text
    • https://slotpt2.com/contents/files/ratuwevagi.pdfIn PDF document text
    • https://taperagi.com/contents/files/gulifuzusoxofomofawetoke.pdfIn PDF document text
    • https://melz-feu.ru/upload/94437839236.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/xikerudeboli.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/72770006027.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/kumura.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/161321e053bfcf---pawawozikosememupo.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3ef48b1eb---xusawufiluxo.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/31956278287.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/60455267671.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/vononodaxepanod.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/jilitegatomuge.pdfIn PDF document text
    • http://csim.jp/ckeditor/uploads/files/dukezuj.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/notozofuzebi.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/fopomozi.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/42267369555.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/rupixagemegasufux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=ps4+minecraft+hacksPDF 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_off0000e705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE705 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 10608 bytes
SHA-256: 5e855913cbab1a11256176ea7da91dfbf11b738b423866437a2116e8ae2e7ac9
font_02_sfnt_off00011729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11729 17620 bytes
SHA-256: 0e1f3bcec579e3121ddf66fc91a1fc502f7e0c2f4a3bf2150556b3849a56ded8

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