Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f019a8a3c03c5f3…

MALICIOUS

PDF

64.6 KB Created: 2021-02-20 21:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 40eff35609f6337ef22e2e6d6df0c26d SHA-1: 1c6274dccf88b1e23f7cf12d264ed6515ae28beb SHA-256: 2f019a8a3c03c5f3c600e6d38230ef8b4e957416e67c6b5680017ee5b0573bc3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=the+joy+of+fearing+god+jerry+bridges+pdf PDF link annotation
    • http://ig-socialmedia.xyz/astm_d445_espaolto7jf.pdfIn PDF document text
    • https://midupupivubol.weebly.com/uploads/1/3/5/3/135343472/rafexidijapab.pdfIn PDF document text
    • https://jugivukovetid.weebly.com/uploads/1/3/0/7/130739525/zewowob.pdfIn PDF document text
    • http://kigurumi.org/70895548496facys.pdfIn PDF document text
    • http://nakezubelakibe.22web.org/limekefabub.pdfIn PDF document text
    • http://se-mrush.com/wallpaper_iphone_xrggy4e.pdfIn PDF document text
    • http://dalkomis.website/nintendo_gamecube_emulator_gameswqwy4.pdfIn PDF document text
    • http://rocketdocs.us/beautiful_images_for_dp_in_hdmzp6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vosimamasi.epizy.com/enormous_turnip_story.pdfIn PDF document text
    • http://wufizomofoduzin.rf.gd/14708940257.pdfIn PDF document text
    • http://javasuk.epizy.com/86287945677.pdfIn PDF document text
    • http://rovatidakenaj.rf.gd/86774734804.pdfIn PDF document text
    • http://jepojofugag.rf.gd/3763085914.pdfIn PDF document text
    • http://wotisonuli.epizy.com/fusekesovimajanulebediza.pdfIn PDF document text
    • http://budavazej.epizy.com/flexible_budget_report_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/adobe_air_android_9.pdfIn PDF document text
    • http://javuturevof.rf.gd/89415723686.pdfIn PDF document text
    • http://pelewonaxiguso.epizy.com/sony_entertainment_television_uk_tv_guide.pdfIn PDF document text
    • http://sawopigemon.epizy.com/agreement_opposed_to_public_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/yookoso_workbook_answers_3rd_edition.pdfIn PDF document text
    • http://zemikajinemoxi.rf.gd/iphone_khng_c_c_file.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE0 5536 bytes
SHA-256: 58a1942ad499d2d9f422c076636b1f63d7d59988bdad6c79733613ecce9d92ff
font_01_sfnt_off0000d2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2B5 10184 bytes
SHA-256: 3ccdd45e50b23bb6657328817ad580a37759c41aab424e17d6c678eb9154406f

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