Malicious PDF — malware analysis report

Static analysis result for SHA-256 408c3e818fd43ce0…

MALICIOUS

PDF

77.6 KB Created: 2021-10-11 00:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 62f48c29fe6a41b18d362c658039faa3 SHA-1: 15569ed1e632b099d50def89df551403c3047819 SHA-256: 408c3e818fd43ce0bce221b7ced3c787f05494799853c9a764583b3a47788179
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are part of a link farm, suggesting a phishing or malware distribution scheme. The presence of a URL with a 'call of duty warzone cp hack' UTM term points towards a lure for game-related scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://infrive.ru/uplcv?utm_term=call+of+duty+warzone+cp+hack PDF link annotation
    • https://godahoian.com/app/webroot/upload/files/72988307750.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/kiburukesogodobenaru.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/25114373249.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20211008144217_86903238.pdfIn PDF document text
    • http://esejsc.com/upload/files/89085727264.pdfIn PDF document text
    • http://camwater.org/media/files/77942480815.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/99311759300.pdfIn PDF document text
    • http://sushimura1.com/uploads/files/20024079007.pdfIn PDF document text
    • https://qian-ho.com/upfiles/editor/files/puxekivozofadagamu.pdfIn PDF document text
    • http://arrhythmiaclinic.com/userfiles/file/20210912170451.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/41668640404.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/76444727595.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/61158053212.pdfIn PDF document text
    • https://xn--90ah6akb9e.xn--p1ai/f/file/vupakaxetu.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/96732796404.pdfIn PDF document text
    • http://gcoekmr.org/cukashmir/User_Files/imagefile/70437074529.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210917081217.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/3359621537.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/38099228661.pdfIn PDF document text
    • https://kvzriu.org/images/file/50698359281.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/kisefap.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/fumaz.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021090705520112.pdfIn PDF document text
    • https://izr.fr/files/88174875822.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_off0000c7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B8 17988 bytes
SHA-256: 03d3d1af86ac1ea9da7ecc093b9027ea0ab6ae9fcee1eeb632c1379aa0b95d99
font_01_sfnt_off0000f6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F09 10940 bytes
SHA-256: e1358eff966032855770f2d7c15d580adff5e0ff3fb7d3d27bae9479e77acb72

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