Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9eba0f1a3c4a76…

MALICIOUS

PDF

73.3 KB Created: 2021-10-01 07:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6a26a4e20c04be5806a635cd0e1d42e7 SHA-1: 0fb4ed8adf7c19c6a8c01c7592ef365eff188079 SHA-256: 3e9eba0f1a3c4a7627059478a797fac908f23d30aa04f6f4be79efb6852c0176
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms or disposable domains. These links are likely intended to lure users into visiting malicious sites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=payment+gateway+android+studio PDF link annotation
    • http://ctnphrae.com/ckfinder/userfiles/files/mogimitamiroda.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ca39a24e85---81520718460.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7c9f6a091f1a8f541ddcb6d2d426a155/gulisajasewebokesegopuge.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/68288870745.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/zexupogiw.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/12612022744.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/jebodumukozuk.pdfIn PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/79928184007.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/doxupuvababivig.pdfIn PDF document text
    • http://24cvety.ru/upload/files/kexozugudesu.pdfIn PDF document text
    • http://wwsm-hk.com/files/file/jexalixavo.pdfIn PDF document text
    • https://tch.lu/files/files/xugiburusiv.pdfIn PDF document text
    • http://studiopedrazzini.eu/userfiles/files/86607361860.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210919061459009357xfhb3ggdlyav.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202109290454307258.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/161557ac61b78b---1270053464.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/27122522858.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/c87cd5239jothhmf2dqrv9gdud/vemili.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/75801271870.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/82779456574.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/80767120356.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161452d60db7f8---32428391135.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_off0000b245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB245 19880 bytes
SHA-256: 828a1ffec0544afeed3e0bca13d8be155aebb04e8b69aa026bc7fd48ab0d325f
font_01_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF34 10844 bytes
SHA-256: f81220b9157c4aebaa74ff22ecd0ba6c1b6d64bfa18aebdec82b131996f9d6d2