Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddc8d6bbaeb008e…

MALICIOUS

PDF

76.4 KB Created: 2021-09-29 07:51:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: afb10e51bbd6884930da00dbc2c63144 SHA-1: 32f71874dba9e773edee89c7410db0cbbe06de8a SHA-256: 2ddc8d6bbaeb008e0524e0f78acc25c70ae8a48337afc6179173236f73c01e5e
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs, including one pointing to a raw IP address, indicating a phishing or redirection attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggests a deliberate effort to obscure the final destination. ClamAV and ML classifiers also flagged this PDF as malicious, strongly suggesting it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://triosms.com/userfiles/file/vitetosibirovib.pdf In PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/61251046727.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/roxasexilawuwer.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/mukapedirevivifim.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • http://vejwun.cz/images/25885567936.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/8299286302.pdfIn PDF document text
    • http://www.sanjuktabanerjee.com/fckimages/file/88598126207.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/34048592766.pdfIn PDF document text
    • https://adverto.ee/userfiles/file/19293333750.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/48187088297.pdfIn PDF document text
    • http://gz-chengeng.com/uploadfile/files/liwame.pdfIn PDF document text
    • http://klenderbio.com/upload/files/pawabamojuva.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/93325655470.pdfPDF link annotation
    • http://kdekdyjak.cz/data/3411970094.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/40355412160.pdfIn PDF document text
    • http://tce.vn/imagesflashupload/file/tiwasakubu.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/54835933112.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/63553010445.pdfIn PDF document text
    • http://poultech.net/d/files/febopukivuwevikuti.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7ad0a1947---bivapijegusuwipu.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/54667098250.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/matelixizexirixer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=redmi+note+10+pro+max+specification+gsmarenaPDF 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_off0000be99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE99 19600 bytes
SHA-256: 23b6468b2f0e58376015be5067faaf32a08729fada118b2aabbe146811ce3629
font_01_sfnt_off0000f1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B7 11240 bytes
SHA-256: a251092cba9588aa95426815ec0e8075a527f02eb671ecfe804a118b485524bf

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