Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4990e35618999cb…

MALICIOUS

PDF

80.2 KB Created: 2021-08-17 00:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-24
MD5: bf7ef0ff99ab51228fd6c92960b50e9c SHA-1: 65de61ed35e856e77eb78c7884f530f87a9a70fd SHA-256: e4990e35618999cbb66ece9f771f5b92dd214a9eed5ccac0844886ef86ebf7fa
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by multiple heuristics flagging it as a link farm and a payment redirection lure. The ML classifier strongly supports its malicious nature. While no scripts were extracted, the embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to compromised sites, potentially for financial fraud or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://communeouchamps.fr/userfiles/file/13241097084.pdf In PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/warogarelunoj.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/79817356254.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/37050060851.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/95272151428.pdfIn PDF document text
    • https://vleek.com/uploads/files/88225729331.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdacbc7e6e---88156444890.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/5ec353c712073928c6d9f870dbe45994/3893328713.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/fee3cea99fc37ea04f682aa0d83c39f5/jazejo.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607585f4bcfb9---92973556132.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/wekamivoba.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3acef42272---26951584839.pdfIn PDF document text
    • http://hrjok.com/uploadfile/file/99061158404.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27f2022e99---tiwamalawugemidetim.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/77c9de61027aee59b61f0781b80196a8/fudeluvilavogixet.pdfIn PDF document text
    • https://agermag.ro/mm/file/26821885453.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/52919060144.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083499cddc53---21494252056.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/geful.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076ce8d487c8---92829924189.pdfIn PDF document text
    • http://canvangdientu.com/images/file/xitedimofinetip.pdfIn PDF document text
    • http://tmfconnected.com/clients/6/67/67cd703e63b47da0cba1438f70967d25/File/60307459871.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/57435171750.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606d16f74a1d0---25181034957.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/26616054031.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+find+cp+plus+dvr+passwordPDF 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_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 10724 bytes
SHA-256: e15e5b3fb96e636ab6bee6ab0330b2b05f8daadab5ec905343f76fb979050d5c
font_02_sfnt_off00010620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10620 17252 bytes
SHA-256: 1d0a9eb5fb55a594a58a7802f608a77956bb17feb0a5609697172dcb94fb83fa