Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9656c084e2798de…

MALICIOUS

PDF

87.4 KB Created: 2021-09-16 03:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 828f43bbc93311a3ff636e8bedabe3c3 SHA-1: ac67f68dcdbdb1fa89e1bd15f02ee41142c26e57 SHA-256: e9656c084e2798de44bf6de9739a238ca5b0b476587943edcc9aa338cb24175f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=safest+android+emulator+for+pc PDF link annotation
    • http://hydrogears.com/survey/userfiles/files/joraruzalop.pdfIn PDF document text
    • http://2222.netsociality.com/upload/files/milukapujiv.pdfIn PDF document text
    • https://sadex.pl/fck/file/salizaxatosunenepixevexow.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/46162344747.pdfIn PDF document text
    • http://konyanincigkoftecisi.com/userfiles/file/xidozoxepanevep.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109082345325285.pdfIn PDF document text
    • http://skiflogistics.ru/userfiles/file/lokena.pdfIn PDF document text
    • http://888chji.com/userfiles/files/sogoxixe.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/valepadutini.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/xebon.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/kozuse.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///32531917400.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/75396210643.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021091214104373499.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/46031272244.pdfIn PDF document text
    • http://ashioke.com/images/library/File/33864562860.pdfIn PDF document text
    • http://podhoru.cz/userfiles/file/49198539709.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/b26e71cadbe5ed11782f8924245c3608/sowetafodoradotetomatuluz.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ecb5ab0ffc---36478794936.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/kovasadojesa.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/17961974298.pdfIn PDF document text
    • http://architettotoma.it/userfiles/files/21817291881.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_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 17536 bytes
SHA-256: 1cc61e127f8781f366af4b716c04d185a46bae261bb466d9088212c1b71e2d46
font_01_sfnt_off00011f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0B 10956 bytes
SHA-256: 58a88e3237a560e68eeefa5622fdca8eeb1ee4de3a0158546ba538613741bfc6
font_02_sfnt_off0001386e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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