Malicious PDF — malware analysis report

Static analysis result for SHA-256 12aa232d1463d835…

MALICIOUS

PDF

111.8 KB Created: 2021-06-23 12:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f728bd37e8b965d42f6bd7b3f3db9d2d SHA-1: a1402aab91fb23d5af0aafc16d74ccf32c661ee9 SHA-256: 12aa232d1463d835fda1fcc3f3048de9e818f6543621db7ee228ae69d3d14ce8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF is classified as malicious by ML models and ClamAV, exhibiting characteristics of an advance-fee scam. It contains a link farm pointing to compromised WordPress upload directories, likely intended to host and distribute further malicious content. The presence of embedded URLs and the nature of the heuristics suggest a phishing or social engineering attack aimed at tricking users into downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pixomot.ru/uplcv?utm_term=motu+patlu+kung+fu+brothers+challenge PDF link annotation
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c927559764---98782453483.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/1445111800.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/6eed318bd9f560619f1507b79324d8de/60553686909.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/bulapik.pdfIn PDF document text
    • http://synowka.pl/galeria/file/putivimawafifobo.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/701695ddc0303edec93a94832479b05f/29253937556.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/zuxuloleseguzolefufib.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/60715128154.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b79a2c4bc---68783212539.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/barajanomirubaxaboxole.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/c0515fcf310bc86188dbfb31b131d30a/95564630023.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/kv1bqeoub2ecalpgpb25uemf8q/kebibesagiju.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c06cd722f---80729888690.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d411aa3218---fuluwaxosivarerijoliloge.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/aj6trbnd0lq5dupf8j47qa6d6f/gexokejumurijepe.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5ec79da67---pebedovosumijaxasiwavip.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/kimagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016b09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B09 5320 bytes
SHA-256: da09db2f88b9bf1173f28e54a25bb3233b158173e641b36b6a107dffb4dfb54f
font_01_sfnt_off00017d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D27 11180 bytes
SHA-256: bf2e8cec14a0391093ddffa7b5f897475f394bc58727cec6fc925012f9c259e5
font_02_sfnt_off0001a343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A343 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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