Malicious PDF — malware analysis report

Static analysis result for SHA-256 bec29eb99bdb508f…

MALICIOUS

PDF

112.9 KB Created: 2021-07-22 21:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: f64c53c66c3f4b04841d009cec922aa2 SHA-1: 534a8fd3584598dbc9b8c4d3883e77082ce5dfba SHA-256: bec29eb99bdb508f1f59ab4c39530c3d50f61aaee8e41fcea3e0e8ac99d87f2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of numerous URLs indicates a strong likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seeandhearbetter.ie/img/shop//contents/68371715188.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/63146649426.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085a6d4f37cd---45380171659.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/a03f6087cbec3645404ac0be3bd1f2e2/texezutudi.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/walove.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/64s047tgsfgltsmlb41jvehnn3/mepurijefuzenep.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b36ba20f15f68630b5e42fcf4343193d/giwivizuxuduriweroro.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/sabizazoratoreru.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/dd4a96d847ef46a0b04c66dd4e0ac5d9/zofidalogowikile.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/42182696658.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/24451111873.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/n5uiclokpls49sfp9a13onhed6/basedepewinupumu.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/8149677350.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/40f1e0fca462d178bff1d6ce2484a408/95799316760.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160927f9a6a292---zisidowononebunafuxuvo.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/tigomisarisanopekuxidadar.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16096ee91c060b---lilapawi.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/a14fc0252bcde4e7042ad781b31b99ff/xilugopofoferadusovagi.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/kezedokitewax.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e881f37d7da---16496465544.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082a2f6bb1f5---47068825185.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609432ed27699---45795264820.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c5d7cd566---6970674765.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/77898299019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=harry+potter+and+the+child+moviePDF 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_off000153dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BF3 10784 bytes
SHA-256: 5f2c0dcd0f4dac1f5e44d2ca2b5a8d084df4c5d4099c26773950fbd057dc88d6
font_02_sfnt_off00018481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18481 18352 bytes
SHA-256: 61e3856c42be228203d31034f92f77b76d7732a5ca75e5687d838019a9e89d68

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