Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb2460c54e75c0e…

MALICIOUS

PDF

82.9 KB Created: 2021-09-18 02:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3af26d08ca66ec7fed957fc507c9ce66 SHA-1: 6438bb9492a8ab67f821ba01640d3149fbec5e2f SHA-256: 7bb2460c54e75c0e5919830a80d53ce8d3036b8173e10b62eebcf786b5845a00
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious intent, including external URI links and a link farm on disposable hosting. The presence of a 'download button' lure and callback phishing indicators further supports a phishing or malware distribution attack pattern. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=bhoothnath+returns+full+movie+download PDF link annotation
    • http://exim5.hu/_user/file/nedixonitawesugidaxa.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/13256505449.pdfIn PDF document text
    • https://jdsliquorlocker.com/nbloom/fckuploads/file/63935855905.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/53115587861.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/88744017395.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/42672487670.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/78077126870.pdfIn PDF document text
    • https://serrechevalier-skifun.com/imagesfile/sanetutaxilopitoziz.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/43942219776.pdfIn PDF document text
    • http://metalzilembo.it/userfiles/files/fumijamojeka.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/97928170021.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/bopufofeso.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16143342f9f9e9---jivapus.pdfIn PDF document text
    • https://henseltech.cz/userfiles/file/liroga.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/kepekotipaxubor.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/89096938703.pdfIn PDF document text
    • http://www.emploi.nat.tn/ckeditor/ckfinder/userfiles/files/miwamarozofel.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/sodatututare.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/92291627333.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/ritogesijuvegukugire.pdfIn PDF document text
    • http://luijkzonwering.nl/image/file/11978516272.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/30396590192.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/forevuv.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/74884206864.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_off0000e021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE021 10924 bytes
SHA-256: 4b4eb132ce6e7f43f38987a0ae43a9858483d696ac90f921b59453885296f3d2
font_01_sfnt_off0000f94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94A 17224 bytes
SHA-256: 390a5bb7b9771079c74edf7518e614ce7e26c3e1bf977b62a337ad073ebbd04c
font_02_sfnt_off000125dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125DD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1