Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c1280769949761…

MALICIOUS

PDF

86.4 KB Created: 2021-08-03 20:04:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1f495ad97ceac26674dcc5bbcbac82f7 SHA-1: 4c6c2b9370b2a7356628c33942f0c9a7a3798989 SHA-256: 13c12807699497613f45ffd6460922346593847b1b32cb222964e429382627da
216 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent is to trick users into revealing sensitive recovery secrets. The numerous embedded URLs, many pointing to compromised CMS upload directories, suggest a distribution mechanism designed to host and deliver malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://drafthe.ru/uplcv?utm_term=quantum+jump+meaning+in+marathi PDF link annotation
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbd18c808c---fomilozev.pdfIn PDF document text
    • http://hondaotohaiphong.vn/upload/files/turekutu.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/b0cdcbbd7228415220cb2b7f6a96082a/28511018164.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/584b6c85d1e7465b2127e61a6440b14b/43867830672.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/01031f9071d3b34b4a5b69e87c417fdc/jusab.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160da5af1424ed---41426025688.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/xaboruvewibaz.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/3831382301.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/hgujuuvjqlatjuf39pu2rmk1s0/66180524727.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/23654020458.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/57921807523.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/lizelaped.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/nenow.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/5410689864.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/d4gngu6efui2fne3alssv62qd5/11337426205.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/69519274026.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/75357822447.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/h7p2hn3o8aesf9osl0b7ianl23/97134320150.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/warepuliseluxe.pdfIn PDF document text
    • https://actorconseil.com/files/file/jubofazidulizululof.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d73ae73c8d6---66205951534.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607951d2b4179---viwuwozesovo.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/65960724421.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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 10652 bytes
SHA-256: a1accd469e007c7b77a7071329359084c5e03a89282ecb0706de697741276d6d
font_02_sfnt_off0001148c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148C 21012 bytes
SHA-256: 21f6b388b6d28205593b8361aecaa833ab85f0308df9b6e06d5aaadb2aa1a693

Open this report in the interactive analyzer, or submit your own file for analysis.