Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce242ee183853a34…

MALICIOUS

PDF

78.3 KB Created: 2021-03-18 06:59:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0387bc168a8660eb1b9e783c50fca73c SHA-1: 920de949bf2db31c279ff2c8e8a6340ecea02820 SHA-256: ce242ee183853a34e87ebd8887c3afdafb63c521305859f9cd29b7750932be78
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or redirection mechanism. The primary URL, 'https://resalured.ru/wix?keyword=ps+i+love+you+pdf+jenny+han', appears to be a lure, potentially for phishing or to download further malware. No scripts were extracted, but the PDF structure and numerous external links point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=ps+i+love+you+pdf+jenny+han
    • https://cdn-cms.f-static.net/uploads/4494877/normal_5fd7d8f0c58a4.pdf
    • https://cdn-cms.f-static.net/uploads/4487897/normal_6038385bccbf6.pdf
    • https://cdn-cms.f-static.net/uploads/4503874/normal_601b22018798b.pdf
    • https://cdn.sqhk.co/vexedobasof/jjjgggf/xanakawarew.pdf
    • https://kapefamutom.weebly.com/uploads/1/3/4/8/134849172/6824003.pdf
    • https://cdn.sqhk.co/tudobele/4gg9Qjd/65184855471.pdf
    • http://ratubave.22web.org/callus_formation_in_plants.pdf
    • https://cdn-cms.f-static.net/uploads/4468837/normal_60107947e60a8.pdf
    • https://cdn.sqhk.co/bogulevim/gcojhjf/rapezaxivelogedovoga.pdf
    • http://fevumajugo.iblogger.org/gestational_hypertension_guidelines_2018.pdf
    • https://kabuvegezukab.weebly.com/uploads/1/3/5/3/135325093/2a46d5690b.pdf
    • https://wagemerefav.weebly.com/uploads/1/3/2/7/132712282/9664445.pdf
    • https://cdn.sqhk.co/dipewoduge/SjgoIgc/vaxowuwomarizojimarew.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_5887401f54c74da1a33ac10e9b3ae723.pdf?index=true
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_b0715b88d02c46e4aadb1cf614a9322e.pdf?index=true
    • http://lixevenenofu.epizy.com/46168299532.pdf
    • http://rexerikilo.epizy.com/nupuro.pdf
    • http://numifugok.rf.gd/70673664586.pdf
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_cb340b6c15014a0ba9af7803a04fe38c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f17e.bin
4bc13bd777f99b3bd8afda397bd8a0c29ecf952175265c9787cd15f744f9aa92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF17E 5272 bytes
font_01_sfnt_off00010383.bin
6f50fbd49aad8e38052be9706bae522db3bdc18ddc05cf0e56f7487d15c1a97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10383 12024 bytes

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