Malicious PDF — malware analysis report

Static analysis result for SHA-256 484ee3ce10483f56…

MALICIOUS

PDF

75.4 KB Created: 2021-09-17 14:23:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c06d0dd4c96af929a6009c301b4615bd SHA-1: e6d5a00688824ebb097dd3d33afa87bd500ddaf7 SHA-256: 484ee3ce10483f567a3d88dce11cce1be2d7db79611f03d95f18f891094537ce
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URIs, many pointing to disposable domains and IP addresses, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=block+text+messages+on+android PDF link annotation
    • http://thibidi.vinadesign.info/uploads/images/files/nupuvogego.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/50784749460.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/tewufojosawupogevudoradiw.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/dutikakibax.pdfIn PDF document text
    • https://wanna-drive.nl/files/File/31955879511.pdfIn PDF document text
    • http://www.herbertvanderbrugghen.nl/draft/69567129512.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/mokiju.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/26693263719.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/gofudagatabu.pdfIn PDF document text
    • http://peak-experience-japan.fr/images/blog/file/jejijoxiripufinigi.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/cc1abf4b7368b232028a423070311d96/59126162770.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/sevupavubiluvolijikalefe.pdfIn PDF document text
    • http://kotolantopeni.cz/file/44562002203.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210907062321_fdefag.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/50015557122.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/39955754693.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141d76708010---rojivezomegupop.pdfPDF link annotation
    • http://cityfate.com/files/files/loredilife.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/zumup.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/tetejadudasajuba.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210910113733_97ugrx.pdfIn PDF document text
    • https://macjiboter.macjahisa.si/files/file/sezuwopegorunetuf.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/84039402335.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/37280380294.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_off0000c1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E2 17648 bytes
SHA-256: 250cb49bee53bdebfa77487d38446ed9244c48b8c5d784cb09d9ac32d280ec75
font_02_sfnt_off000106d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D8 10960 bytes
SHA-256: 19a4fd1b0016e19bad0c8026dcd9afbae0ff7743c066804209ca5ee8685c250a