Malicious PDF — malware analysis report

Static analysis result for SHA-256 23732df163b2442a…

MALICIOUS

PDF

84.7 KB Created: 2021-09-20 10:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4967b5cba247f5f6ae81379a77a65f80 SHA-1: 3fff855c1555f4328e3f07f671a81756058674d9 SHA-256: 23732df163b2442a957bd287a5e2077f9e6e1d7845225f52af1cdd032c4ce5a2
196 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, designed to obscure the true destination. The document's structure and embedded links strongly suggest it is part of a phishing campaign aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://genegurumiraclehealer.com/userfiles/file/15933939924.pdf
    • https://immsac.pe/sgi_userfiles/userfiles/files/vuduxilutejusosut.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/2ac69e545187b44f7c949dce62ecdfff/39944910983.pdf
    • https://www.fangjin.org/ckfinder/userfiles/files/dinaranepusikov.pdf
    • https://webaprint.be/img/file/24167636937.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/wejikepumefukuwogaka.pdf
    • http://klenderbio.com/upload/files/wodozifuve.pdf
    • https://podereilmontaleo.it/writable/public/userfiles/file/73349320034.pdf
    • https://yellowstonewildlife.com/bomotipubefipotodu.pdf
    • https://mimpiindah1.com/contents/files/dizekivite.pdf
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/48372848167.pdf
    • http://termocity.by/pics/files/xoserujopemoronivusaxumo.pdf
    • https://renault-service.com/userfiles/77473414951.pdf
    • http://ahcxdq.com/uploads/file/062145273963.pdf
    • http://ekorepetycje.eu/Upload/file/jeropotixitopetotoboruki.pdf
    • https://rallstarawards.us/nbloom/fckuploads/file/22694456117.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134aa9a2d3a2---mapakoporosejikedadew.pdf
    • https://minjar.mebel18.com/uploads/files/roxivapedajidamafodarizo.pdf
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/piguzatezomaditeje.pdf
    • http://tuttotop.com/userfiles/files/depugupulefime.pdf
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/52018061782.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131ae1a57214---38624523371.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=application+acceptance+letter
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e849.bin
aa9bf611a007937f944a89e17d6989462e4974478f635e59f14abd825a356c75
pdf-font-stream PDF embedded font (sfnt) at offset 0xE849 17600 bytes
font_01_sfnt_off00011601.bin
5f03f8730551d23f2f3690eaea9b8ff12e624225549403e962163d7345f99d3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11601 10180 bytes
font_02_sfnt_off00012cf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF6 16792 bytes