Malicious PDF — malware analysis report

Static analysis result for SHA-256 2982ed3c4dafcd2a…

MALICIOUS

PDF

76.7 KB Created: 2021-09-16 04:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fa83445c11e65aea33bcd42a9ef60bf1 SHA-1: 8828654afe21008268326d9d42d37f133a043387 SHA-256: 2982ed3c4dafcd2aac23d32b75f1bc25a510e030794c036c8ec2b01b367e9d37
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document functions as a link farm, directing users to numerous external domains, many of which are hosted on disposable infrastructure. This pattern is commonly associated with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://fiscconsulting.com/userfiles/file/12418957711.pdf In PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/xasin.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/99691156996.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/xuvazozod.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/zapasizububovu.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/diwerukanizexapinevubej.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/19051625734.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-12-13-25-11-CkWTiI2x.pdfIn PDF document text
    • http://skene.es/userfiles/file/11314188105.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/dafuson.pdfIn PDF document text
    • https://penal-garazh.ru/files/nejazukirojujovilipezo.pdfIn PDF document text
    • https://csodamalom.hu/files/files/79256817694.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/81176766012.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/batisati.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/5835593355.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/44394335941.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/tt7ud3jv8o51ila63gal2befs1/dufaluminoba.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/7s3se8pr7dueekkt1l5d1g8grv/fefaladewovog.pdfIn PDF document text
    • https://charming-dc.com/uploads/files/202109032159038073.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/65216089857.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/93461660283.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/94083159281.pdfIn PDF document text
    • https://invest.pl/userfiles/file/movudol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=subway+surfers+modded+iosPDF link annotation
    • 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_off0000c23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23A 10784 bytes
SHA-256: 95c2aad277136af9b536bea23656e188e90c6f6d2cf41542315d7a9415520d49
font_01_sfnt_off0000db23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 19356 bytes
SHA-256: 3bd10aa1048fd1a07bb92bf36b869e004cfe9917fd0fe54b9d5287b360b13e28

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