Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3dea550360387ac…

MALICIOUS

PDF

86.5 KB Created: 2021-07-19 19:01:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 39be3f12772cfc602d4266cd5804e7fb SHA-1: 575ce44246690d105e9fa686c4af086fa1f482bf SHA-256: f3dea550360387ac4bfabc966330cabfc450a6245add409dd666b594b4b3e7e9
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is a payment redirection lure, a common tactic in business email compromise attacks. The document contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9c77d7f0f---zegorax.pdf In PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae25c6e4cec---telakejizarupadafuxawo.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/72578320317.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/m1fcjhnhophrpg5vrih694mpq2/gonufufomudinimixure.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d759f7794eb---51738498189.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/zewekixitiwifupiwinutoz.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/e460f2ad4309bd9a4db7abf533d16e04/fepofolitabibo.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/6bjosii7epdf3if823q79nrvs9/kewutiwiruwakifub.pdfIn PDF document text
    • http://pastoret.it/userfiles/files/luxenez.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/84493366906.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/38369915531.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc472bc1c---64952376002.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/037a6882f2ae44a572ef581596a11884/fulebusenifabanop.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/85063389509da801e15b75ec5bee7c92/77430020334.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/95eb145aee81fed2616f3ce07a8f8d0f/zavobasigewejo.pdfIn PDF document text
    • http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/kuvujebotojupadetumoror.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/bugign8ht1lvko4omstke87su0/zokogubedivaluripemu.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f38519bd6b---xepibiwazuzunefobev.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/ladavotazagarudige.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075b6eab48c3---wuroki.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a77a4ab76---2611735573.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210624_CAEA03F7D91EFC2A.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/77045085424.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097e938d99cf---mokawagox.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/56995663112.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/14013291766.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/torinez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=what+does+a+credit+charge+off+meanPDF 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_off0000f062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF062 10868 bytes
SHA-256: 01482540a73bc8aa34e383f0a8ffe5709eeb9ba64938c3b9f751c8212acabc0a
font_01_sfnt_off00010923.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10923 16688 bytes
SHA-256: f7aa3eb5f96514f05aadcc5e50203733f47d03e46e22935c0c6e67e0f0c63877
font_02_sfnt_off0001348c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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