Malicious PDF — malware analysis report

Static analysis result for SHA-256 2935b8f5c45ea3ff…

MALICIOUS

PDF

66.9 KB Created: 2021-09-17 05:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2178df112094ed152e23b5111861cabc SHA-1: ad0f92e12d0fec266635677745ab6576c6f9024e SHA-256: 2935b8f5c45ea3ff03c9ea6bbe8c8f0db73948e961242e99c9b026b5e5d7d9a2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URIs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=download+android+10+rom PDF link annotation
    • http://torby.kbo.pl/ckfinder/userfiles/files/5290133237.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/japor.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/56179686372.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-14/20210914125955622542.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/lalilavozozezapala.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/58030166736.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/zefutixodofased.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/80743015559.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/83283732997.pdfIn PDF document text
    • https://tigapilar.com/upload/files/48409844551.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/86826453535.pdfIn PDF document text
    • https://zagi.hr/files/negifiba.pdfIn PDF document text
    • https://linardi.ru/files/file/79609370334.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/wexojolupi.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/ximametajowatewujeti.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/33137508863.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/7871221375.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/63469239974.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/kidalemuza.pdfIn PDF document text
    • http://bienchidan.org/uploads/files/44720130624.pdfIn PDF document text
    • https://mgs-on-track.com/uploads/misc/files/26575331929.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210903_92DCB6360F070F87.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021091402343135.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_off0000ac25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC25 14204 bytes
SHA-256: ab8a273e773aaeb88247297d7af3bb552e779a7f4b140d15da41d2f5cd7f4aba
font_01_sfnt_off0000cf5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5C 10272 bytes
SHA-256: 31ca458d993be19fdb85a4f6ba2e94ca0ded142cc96970a97c4f463217256d35
font_02_sfnt_off0000e669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE669 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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