Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2bc07d0618ebdb…

MALICIOUS

PDF

90.9 KB Created: 2021-07-03 15:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1cc81eb76122431387710429387d1c63 SHA-1: a0f7f410dd30dcf1cd11271c8e867567766fe739 SHA-256: 1e2bc07d0618ebdb13e9202e533c5861d39d929e5b488099f217a6a18b0ca80a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of embedded URLs and the overall structure indicate an attempt to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://infrive.ru/uplcv?utm_term=shooting+games+unblocked+at+school PDF link annotation
    • https://simplehome.ro/ckfinder/userfiles/files/69701502016.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3becb7d32---morufewaxijalokenojopa.pdfIn PDF document text
    • https://trickapotisk.cz/webpagebuilder/ckfinder/userfiles/files/30776758802.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/11059596902.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/ddc285b394a05bc77781ab458879baa1/63154647549.pdfIn PDF document text
    • https://efnnma.org/files/file/puxapojobaxupazizepemuki.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e6f164912---34662342555.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075b43cb2485---28280916073.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/60162754840.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/1d4f8177191fe581ded5c856e777eaac/mugerokatupujibipebubap.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/53964091513.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab71632c342---sibibilukiwibomedose.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/f5361d63fc3fa12f44feb0b5292a8953/lifubiwujizu.pdfIn PDF document text
    • https://bamor.org/userfiles/file/gimipigifebifebilaf.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/57075703087.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80fd577184---wutiwunoguvutanaweladoraz.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/b6562805327f4184875c6b92743fa8ff/32289279810.pdfIn PDF document text
    • http://galgalesh.com/userfiles/file/24863183686.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/wotixuvodawori.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/lejinumebanaketetoji.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/77398427701.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/t8jr3vof9abdebsf47br0qofr2/76373284943.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16094d4664a2bd---2819389616.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160adb6b360e20---filokipejok.pdfIn 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://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_off00010015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10015 17156 bytes
SHA-256: 5b8aa11a37efae585ef8ff75e91298a7481bef65a2f394f291d4f39b4c35ab92
font_01_sfnt_off00012cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000144d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144D8 11124 bytes
SHA-256: b2fc9b07f07de460319affb2f1a288092d4d09a08bbdfe35d9ccb16c508bdd1c

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