Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec203e044149b01…

MALICIOUS

PDF

75.1 KB Created: 2021-09-28 12:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2f8b706c862779f29cdc039249145a16 SHA-1: cadfcc4c7c038bb5989b6772e7f5324ff4ac6b71 SHA-256: dec203e044149b01f2676d37288ab951647663fc56f9a681685f34418dbd570d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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=my+hero+academia+season+3+in+english PDF link annotation
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0908/39e6cf5f7b6a6f4e91b0f64776398f00.pdfIn PDF document text
    • http://aprt1day.ru/file/78150001521.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/vefifomuz.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140f4493ae93---59617451409.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/supetamajuleguvulamig.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/fipabuwekevozowisafujita.pdfIn PDF document text
    • http://quocteanviet.com/img-chamthi/files/78087100087.pdfIn PDF document text
    • http://it-hair.com/userfiles/90018003922.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/34393882727.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/favenipiwitesixizolawa.pdfIn PDF document text
    • http://vina2002.com/uploads/files/gunagodokafita.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///27286687402.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/63949780640.pdfIn PDF document text
    • http://msmzizkov.cz/data/dokumenty/kotagirolosev.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f76fb80ad6---daxizosiw.pdfIn PDF document text
    • http://enkepharma.com/upload/files/73297623207.pdfIn PDF document text
    • http://signauction.net/userfiles/file/mevawew.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/wubijabigotejulibi.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/zajivetizotiwin.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/mamilexaluf.pdfIn PDF document text
    • https://www.funes.gob.ar/ckfinder/userfiles/files/44061825961.pdfIn PDF document text
    • http://naviway.su/upload/files/mapodanafetujozowazut.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/9108789975.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_off0000bb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8E 18908 bytes
SHA-256: 8a6a4f7b4515269935401b48bc171f70fda9c4612211b018f6162c5ef847eb20
font_01_sfnt_off0000ed28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED28 11000 bytes
SHA-256: 750196821892ec5e6eeeaf0d0847a3939f57cf155000e0cf418a0929d0b04057
font_02_sfnt_off00010657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10657 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.