Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2cd13916f8c05c…

MALICIOUS

PDF

70.8 KB Created: 2021-09-29 06:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 46e41d356c49d39a3039aba7efd162fe SHA-1: 2736a26671f9b1e995e8e7938edbb35784af9190 SHA-256: fe2cd13916f8c05c024314385f973403cff6c7ed1fb144939ed0c1e5334b5dbc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • 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.
  • 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://synerhu.ru/uplcv?utm_term=how+to+download+android+tv+apps PDF link annotation
    • http://short-story.ru/upload/file/nevogibolaruxotute.pdfIn PDF document text
    • http://rayer.cn/d/files/viwevomogerosozokap.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/xupise.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/46462462277.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/xabibusaruvudusuj.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/17018846875.pdfIn PDF document text
    • https://horizontire.com/userfiles/file/89202743207.pdfIn PDF document text
    • https://poojaindiangrill.com/nbloom/fckuploads/file/nabapajusidu.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/27637674534.pdfIn PDF document text
    • http://rm-centr.ru/uploads/file/kusexibikuzekowuxad.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/35dde72f89ce4045ef19df79e1578e40/zezorovawedirexuvajera.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/40031358653.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/razopedeku.pdfIn PDF document text
    • https://khanoomhoteli.com/basefile/khanoomhotelicom/files/36583741966.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/36039554202.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210919015836.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/97330398054.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/metogofebezodumul.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/fosenuxujiza.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/nederapafewu.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/mokowamuvufilenafu.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/rugepejikizirasoxaxa.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/tibagujid.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_off0000b3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AD 10396 bytes
SHA-256: 45e147a46a5a15d7510c8d7bdf0c2b3fc5f4b0ce304e9691d608ae1c61e0cb4c
font_01_sfnt_off0000cb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F 16608 bytes
SHA-256: 2094a8f4529caead1fdcb4219e1d312a8bc7e10b539b755595a2a6b317a4dc51

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