Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3fc02e4221015c…

MALICIOUS

PDF

67.7 KB Created: 2021-09-18 20:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7fba7dbe038c7b5468c3f49d1090c50d SHA-1: a284acc809c5cf8ff27d9536ddf6fd651aa3990e SHA-256: 2e3fc02e4221015cd1546974c364a766180e4c6ce73cda5d2fe2bb9f69842373
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a phishing lure due to its small size and image-only content, designed to trick users into clicking embedded links. The heuristic 'PDF_IMAGE_LURE' and the presence of numerous external URIs, including one pointing to 'crewmak.ru', strongly suggest a phishing campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to redirect users to credential harvesting pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 0 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://crewmak.ru/uplcv?utm_term=quick+book+online+accountant+login
    • http://smolensk-bakaleya.ru/userfiles/file/34257923813.pdf
    • https://denimder.org/resimler/files/sumipitekujimeza.pdf
    • http://poetische-malerei.de/web/editor/files/42030188471.pdf
    • https://acconpriti.com/ckfinder/userfiles/files/47362153770.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16133b4ae64411---22370938498.pdf
    • http://leicesterbiketec.com/userfiles/file/5540753559.pdf
    • https://www.meditech.cz/ckfinder/userfiles/files/2497501608.pdf
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/dovekoririrufoge.pdf
    • https://wmu24.ru/media/file/jexetuwulemideretugupep.pdf
    • http://coachhouse.info/assets/file/605272199.pdf
    • http://epmachine.ru/d/files/23662901800.pdf
    • http://bidwoodmachine.com/d/files/53387854001.pdf
    • https://gangnampools.com/contents/files/77376087283.pdf
    • https://derfo.info/resimler/files/tikopetuvukevo.pdf
    • https://heks-tech.com/app/webroot/userfiles/files/95860168300.pdf
    • https://cfacgroup.com/uploads/FCK_files/file/61752450091.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334f42299ec---11776081382.pdf
    • http://ozdermusavirlik.net/userfiles/file/ninozenaza.pdf
    • http://afghansolar.com/userfiles/file/69114952726.pdf
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/tuwonira.pdf
    • http://china-baby-clothes.com/d/files/59828564807.pdf
    • http://serting.eu/userfiles/files/75066362735.pdf
    • http://amunt.madteam.net/ckfinder/userfiles/files/bowukufuwufimamumefi.pdf
    • http://learnazia.com/fck/imagesfile/noraxenafowurazid.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad4b.bin
f946e54245b58d2dd04e97b96a7e884ec103baf3886fa03e2539a7c8d57d7d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD4B 13880 bytes
font_01_sfnt_off0000cf57.bin
5cb6f2d290f3b01b1d791a1c8efc0cce9ed176d8c8f23a0d4af7d021e6a4b8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF57 10528 bytes
font_02_sfnt_off0000e78b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE78B 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.