Malicious PDF — malware analysis report

Static analysis result for SHA-256 e979d3fc33514db7…

MALICIOUS

PDF

67.9 KB Created: 2021-03-03 05:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8cbe96dfcf202c4b473ebfcf73f6aa7b SHA-1: 870e152554f77b30294aab58aa2e70f77a83f04b SHA-256: e979d3fc33514db7722ba7d3d78752efefc2b84c0116079edb4c2e2ef416c854
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and redirectors, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a spearphishing attachment designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=korg+sv1+stand+stbk In PDF document text
    • http://getsol.xyz/3294650938769h99.pdfIn PDF document text
    • http://visionnew.xyz/khufra_hero_guidesg3ga.pdfIn PDF document text
    • http://pixelbarista.com/home_paint_colors_applvpwg.pdfIn PDF document text
    • http://argo-tourism.com/jajonitozo7k3ei.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/what_does_heavy_rain_sound_like.pdfIn PDF document text
    • http://smartbright.club/fl_studio_tutorial_apk_download98k96.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/mefilivipe.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/adjectives_to_describe_dark_forest.pdfIn PDF document text
    • http://believes.space/deutscher_schauspieler_das_wunder_von_bernrbda8.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/sparknotes_king_lear_act_4_scene_4.pdfIn PDF document text
    • http://shtangennstutkupitseychas.xyz/65717745450574sv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://diturasenupope.epizy.com/dinner_invitation_card_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/61741100520.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/64874333052.pdfIn PDF document text
    • http://livirava.atwebpages.com/17103735913.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_off0000cb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB22 5244 bytes
SHA-256: 5f99474b138241a2228567c7cd5933ec1f26477e71b40266a9947cf9c3d189ad
font_01_sfnt_off0000dd14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 11480 bytes
SHA-256: a97165c49dbdbadff92d294103112256b40656b997621c9a1a4d5daee45ee69e

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