Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea015d948a20e90…

MALICIOUS

PDF

80.1 KB Created: 2021-10-18 00:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 30d99fd4c1c7217abd7b1c34f9a32c7f SHA-1: 1d637919192fd0908ebac8afbc060f1f6f7b5c72 SHA-256: cea015d948a20e9093cdeea34a79bbe3a3caf53a9f8703b2b7aa422fdea97156
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly indicates the document's content is designed to trick users into clicking malicious links by impersonating financial transaction updates. While no scripts were explicitly extracted, the nature of the URLs and the lure suggest a potential for JavaScript execution or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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://crysiq.ru/uplcv?utm_term=checking+and+reverting PDF link annotation
    • https://ipekyolumedya.com/resim_galeri/file/vafefalezevigusidunasi.pdfIn PDF document text
    • http://berbun.com/user_img/file/sosarerawivuzenomub.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd92f8091d---vizixixipaxokokoni.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/68997932241.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7301d9dcdaae5a3f2e25e6cc22274952/xudesomipigigususinir.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/jaluzew.pdfIn PDF document text
    • https://beaszemin.com/files/84929094507.pdfIn PDF document text
    • https://toppelletmachine.com/d/files/30513950224.pdfIn PDF document text
    • https://visualmotion.nl/uploads/file/xatebab.pdfIn PDF document text
    • https://arslanemlak.com/E/file/In PDF document text
    • https://gallerylingard.com/uploads/file/pabuwedumo.pdfIn PDF document text
    • https://atlanticcompact.org/userfiles/files/jenugefakapudimibik.pdfIn PDF document text
    • https://freeunlock.com/uploads/file/kisexupimomaberexuxadej.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/36706867652.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/60884966873.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/silobivabogaxadoxapun.pdfIn PDF document text
    • https://cncunse.com/d/files/68329334359.pdfIn PDF document text
    • https://chongtham68.com/app/webroot/uploads/files/woxoxawativawelujefoba.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/89486522875.pdfIn PDF document text
    • https://coevent.ru/upload/files/9097898049.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/fl15hkflujf6ug4ilbh2pqu6c6/tisulu.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_off0000d56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED80 17784 bytes
SHA-256: ad4cf469ccd69f9215fc37fa92567cbb8334c88f57de0c78b1f8eade7631ce92
font_02_sfnt_off00011b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B92 10504 bytes
SHA-256: fb15cc209195be791ed2acce5d277489eff926ff6bab8c9f0d4c4d03f692279b