Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc5017418f6b7d1…

MALICIOUS

PDF

92.9 KB Created: 2021-06-11 06:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c430a155545335e308617d6eeb9214de SHA-1: b50dbc5b798bce51d4a3b4b0d817101d1a8e52ee SHA-256: 8bc5017418f6b7d1ea08049e8778876bfdb220e72bb28bae3cb6a2a79b75e244
204 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, presenting a lure related to lottery winnings or parcel delivery to trick users into downloading a malicious file. The presence of numerous external URIs, many pointing to compromised WordPress installations, suggests a distribution mechanism designed to host and serve malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://catamma.ru/uplcv?utm_term=current+affairs+2020+mcq+with+answers
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b745b11de0f---74552202842.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/fa5bddfcd161b0b85408ce23cd70b8d7/86727516267.pdf
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/6b98b62ca0902dcc24ad2d1f420d492a/85817869292.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/hudsfjbgip8kht7auv5q2vbvlr/nosobat.pdf
    • https://myveolife.com/wp-content/plugins/super-forms/uploads/php/files/5d3fb757d9ce114149a90817c6b533b5/sirazubizugarojifar.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aece72caa9---zivulopizifelagotanex.pdf
    • http://aarogyamedico.com/userfiles/file/74345790357.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1dfe25536---movolasavevajofora.pdf
    • http://eortak.com/img/fck_temp/file/99403991097.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a8ff6bd6e---37766295952.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f61dc05b7---69174590370.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/73868098023.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/af6497f2db2dee545cba8edd932e11c5/65122913984.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d01fa55fd52cb5f430802af546a28e1a/nipujimeripukojodumu.pdf
    • http://bean2beenefamilytree.com/clients/60578/File/taxalagakigopibomenaxoxu.pdf
    • http://myjobcareer.net/userfiles/file/2021052810062473499.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/96a54931c01949cdfcdb36b63cce0587/gofezosupixugolugo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d92.bin
5d596b8b773c5b49553fc9941f791c8b2c3200b1a4afb7e9b3c872cf1e67ef7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D92 5488 bytes
font_01_sfnt_off00014024.bin
680d7c5b7b490f05257c403eb659db05f4b41d565da6ed463e36e2c0f1e6289b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14024 11252 bytes