Malicious PDF — malware analysis report

Static analysis result for SHA-256 115ed8642450fafd…

MALICIOUS

PDF

91.2 KB Created: 2021-09-13 17:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 378fabf7f47cae8089cf372633c44ad6 SHA-1: d6bb63ffe5f781c8058ed5abb8a7b3541ee05c38 SHA-256: 115ed8642450fafd85d733d5cb160d8c19857a096247110e397552f4f07a2dd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, including one pointing to 'pixomot.ru' with a 'fall_guys_android_apk' term, suggesting a lure for potentially unwanted software. The presence of multiple links on disposable hosting further supports a link farm tactic to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://pixomot.ru/uplcv?utm_term=fall+guys+android+apk PDF link annotation
    • http://lishasurgical.in/ckeditor/ckfinder/userfiles/files/88144186075.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/65757060684.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/4631562353.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/4930801153.pdfIn PDF document text
    • http://laureysnv.be/uploads/files/podevezerefalekubum.pdfIn PDF document text
    • http://zkqzl.com/uploadfile/file///2021090414195373.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/12084130340.pdfIn PDF document text
    • https://ienter.bg/files/kuwomufugajofelituv.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/39435400686.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/xazesutidakukirokidotesit.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf01a1959c---xedatolemunibezizokosir.pdfIn PDF document text
    • http://gcsiva.com/files/userfiles/file/mofejiga.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/movijitawokovejiguwusemu.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/bumikelodikugeluzipaxix.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/devepivawaxif.pdfIn PDF document text
    • http://ukwoodrecycling.com/userfiles/files/kevovewaxasujoxijiforep.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/vemovisunubujalot.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/b01cf0ac5490694bb0f4f8470900f0df/43217738354.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/tovox.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/47025404366.pdfIn PDF document text
    • http://penetrat.ru/files/files/votag.pdfIn PDF document text
    • http://vaynhe.com/upload/files/14883157129.pdfIn PDF document text
    • http://regmac.net/userfiles/files/fedajopibobopezozavagel.pdfIn PDF document text
    • https://tenekedjieva.com/uploads/file/ruwenilazudifo.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/36550739444.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 10620 bytes
SHA-256: 1feee54900bcc0d13c60d14d4a5f520af008801211a6fd4e99cf4d50864ee407
font_01_sfnt_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 16128 bytes
SHA-256: e086d997b6ee3c3fe48f8fdf49e8854b9e9bef9c53b5c2c5f26bba4f2b277426
font_02_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 22276 bytes
SHA-256: 1f85051aa94032d02be64b60b3b36e00209ebe57d2e018ebe083d483eba24a4f
font_03_sfnt_off00014657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1