Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a58246fca389dfb…

MALICIOUS

PDF

67.6 KB Created: 2021-10-04 00:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6aa5a4fd60dadae7fd00c0183304ba2b SHA-1: e621a700f29042eea0ce8baf57573d66a026b5fa SHA-256: 0a58246fca389dfb468da962ffdebb91ec3859a84966a1d67a0848551ce7abf2
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide malicious links. The numerous external URIs, including 'https://huntic.ru/uplcv?utm_term=silence+tamil+movie+torrent+download', suggest the document is part of a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://huntic.ru/uplcv?utm_term=silence+tamil+movie+torrent+download PDF link annotation
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/8cc64cbbadd2254602f719a4646e203a/21636401466.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614d31a9967de---77905545623.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/54317807146.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/tanefomurifuzega.pdfIn PDF document text
    • https://badrivishal.com/media/besigilanevegabowet.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/29278217706.pdfIn PDF document text
    • http://mobilenmr.com/files/files/58225531994.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/11189558350.pdfIn PDF document text
    • http://nattukoottam.com/userfiles/file/72394188483.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/fokonirobazob1633285241.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/4099179591.pdfIn PDF document text
    • http://raffaelecavazzoni.com/userfiles/files/kividuforajewobemukuxosit.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/77718748789.pdfIn PDF document text
    • http://www.elmundodelapiscina.com/ckfinder/userfiles/files/xixogobufugiwepitid.pdfIn PDF document text
    • http://355353.ru/userfiles/file/9392301187.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/nezugiwexulofe.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/59775832145.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/ruwolisemikizawupebigatim.pdfIn PDF document text
    • https://kimcert.net/E/file/zuwokiluruzotoxiwa.pdfIn PDF document text
    • http://come2menorca.com/images/file/nazugewojitekexubogivova.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210904040017196.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/kagagefexuxaz.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/puretepozubusomub.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_off0000acf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACF4 14360 bytes
SHA-256: 8f6b36329368e93d06cbd6a8657e0c1e3d9b47cef7b506eb097a2c634b727376
font_01_sfnt_off0000d0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CE 10592 bytes
SHA-256: bd8dd2f6a7c86d82c9b6c437576d4ab765f274f3801d44a76ff85ed80dab5c7a
font_02_sfnt_off0000e901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE901 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1