Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd996373640b2e2…

MALICIOUS

PDF

72.1 KB Created: 2021-02-15 09:41:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3b984fadc7c4ab238f7e6e78b83ba148 SHA-1: e3eff4f49a29c2440c9587b517e2fe30171470e4 SHA-256: 1cd996373640b2e253899a95d79d55f8504daf759a60b5df4f6b46ffa013db1d
184 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links on disposable hosting suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=iphone+lock+screen+marshmallow+marshmallow+wallpaper In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370066/normal_5fda550839872.pdfIn PDF document text
    • https://xanovisawedota.weebly.com/uploads/1/3/2/8/132816091/01c71a2.pdfIn PDF document text
    • http://ostanni.fun/weradajajavogejorezigad5o5c.pdfIn PDF document text
    • http://idealslimitalia-official.site/android_one_android_10_updatemraj2.pdfIn PDF document text
    • http://fastdonwload.space/brahms_lullaby_pianok087b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501645/normal_600fd40b8820e.pdfIn PDF document text
    • https://wuxavuzipirugud.weebly.com/uploads/1/3/4/0/134012349/1622996.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419452/normal_5fe2881d2a44d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495391/normal_5fc6a479424ea.pdfIn PDF document text
    • http://tcerkovniekupola.space/kudinebegekazaxebipelgdh.pdfIn PDF document text
    • http://gufutaca5.xyz/19725141009gift2.pdfIn PDF document text
    • http://creamspait.xyz/amblygon_ta_15_2nxzuw.pdfIn PDF document text
    • http://pc-remont.website/50232300443ijw7.pdfIn PDF document text
    • http://natorg.fun/faceing_math_6th_gradetfwrh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5fde114824e46.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/1309498.pdfIn PDF document text
    • http://kurs1.xyz/kevlar_hockey_socks_reviewpjwac.pdfIn PDF document text
    • https://gewujamagig.weebly.com/uploads/1/3/5/3/135339218/7104317.pdfIn PDF document text
    • http://mjawebdesign.net/linkedin_learning_logocoh9u.pdfIn PDF document text
    • http://repair-planshetov.ru/684959691713i8se.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/49657838152.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/animation_movies_2009_free.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_off0000dce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE9 5268 bytes
SHA-256: fed2acdb985d24592f1c6dc323b385ce96568014be0847047f21749f83b514b7
font_01_sfnt_off0000eeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 10476 bytes
SHA-256: 51021f40cd012131e184e3aa6028fba0f3b20fa1425c3095f1b7b3fb9dfd1694

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