Malicious PDF — malware analysis report

Static analysis result for SHA-256 32084be9a79ad68d…

MALICIOUS

PDF

76.6 KB Created: 2021-09-17 08:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a8ae325387a3fd114f739eb07efce7ca SHA-1: 7af408467ccc36800b237ba97745779494a7a468 SHA-256: 32084be9a79ad68d06ceff125801a2f0f1ec3f254e198cb25945c4733da5fd52
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous external URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to direct users to malicious websites. Additionally, heuristics indicate the presence of QR code and callback phishing lures, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • 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
  • 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.
  • 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://archism.ru/uplcv?utm_term=group+verbs+list+pdf+with+bengali+meaning PDF link annotation
    • http://medtravel.pro/images/hand_uploaded/files/56768288430.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/jufosama.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/dibagazunowufibu.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133034c8d1ea---84425002772.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/narexojiwejomosu.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/69066795178.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/wadujopitugawumam.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/10879197563.pdfIn PDF document text
    • https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/74693218795.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/050201541575.pdfIn PDF document text
    • http://printrun.nl/userfiles/files/78170123045.pdfIn PDF document text
    • https://homestayhoian.thamtuddt.com/uploads/image/files/51266841649.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/54499548854.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/55216534901.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/15285686706.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/zelowekiwuwes.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/jepuralafigatonijimeveken.pdfIn PDF document text
    • http://www.satit.nrru.ac.th/satit/_Adminis/ckfinder/userfiles/files/90432323890.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/55672131335.pdfIn PDF document text
    • https://vozilasavozacem.rs/files/bedidujilefuwevizoz.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/33ac4fbee07ce95719cd2bf175687a06/31963181692.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/womumizejopuridi.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_off0000c16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC16D 11376 bytes
SHA-256: 8e73c98dad87c9138d9036355d2f29b5460c6f87948d0fc7f0dd7532525da41b
font_01_sfnt_off0000dba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA6 18868 bytes
SHA-256: 2cb99414fb743e52682c7ca4084c25db78e8f826b8c6fe8e9dd2a1bfeea72f80
font_02_sfnt_off00010d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1