Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b06368a7dbda34…

MALICIOUS

PDF

69.0 KB Created: 2021-04-04 06:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aafffbbf742647ddf43b5e73924da0f SHA-1: b1c7741774ad5e53eff5bea6545d7958c53d7688 SHA-256: 82b06368a7dbda34f126b15e6bd907791dbed4f103d99a750c633288a60615bf
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for a free book download, aligning with a phishing attack pattern. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/award?keyword=spiderwick+chronicles+book+4+pdf+free+download
    • http://tesilav.sportsontheweb.net/ambiguous_loss_book.pdf
    • http://sokitejosororag.iblogger.org/3205687907.pdf
    • http://gizaripe.iblogger.org/37353952738.pdf
    • http://pomuropujuj.22web.org/43317251926.pdf
    • http://dorubugupik.22web.org/pujiwiwizugelolisod.pdf
    • https://cdn.sqhk.co/xupodafib/RiaDh9X/27804605637.pdf
    • http://xakujuseboxomov.iblogger.org/dedesijolizav.pdf
    • https://cdn.sqhk.co/wovupeni/cqSVroB/ear_infection_in_dogs_yeast.pdf
    • https://cdn.sqhk.co/numokafas/jgjahho/89485781294.pdf
    • http://minesaxofunawi.getenjoyment.net/what_does_genesis_chapter_6_mean.pdf
    • https://cdn.sqhk.co/zafupusapun/ao5vOij/47853242516.pdf
    • http://dalejupoguj.22web.org/jowikuzifafa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lurutopobi/fezawo.pdf
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_6ab14206e42c4f5197c09b8d069568c2.pdf?index=true
    • https://s3.amazonaws.com/mozedijiz/online_iti_form_maharashtra_2019.pdf
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_fc19458e3d1c4a53bc0ee92e1937afb7.pdf?index=true
    • https://631ffb88-cf2d-4844-8d6b-9338a1b21cc5.filesusr.com/ugd/d24e6f_5561c8b8d26448d48251c2d9d69b0c61.pdf?index=true
    • http://kepefemez.epizy.com/27138770618.pdf
    • http://damexodawu.epizy.com/febusowazaxigumulibifokuk.pdf
    • http://mubadel.epizy.com/63574749653.pdf
    • https://s3.amazonaws.com/lofese/66055551856.pdf
    • http://jirabasojexosud.atwebpages.com/stages_of_green_revolution_in_india.pdf
    • http://matujuluji.epizy.com/xitam.pdf
    • 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_off0000cf4a.bin
738145bb3b33efa51e3b844bd37b3ded5c7ac0b5423af93a6e7b5787fb2a6e58
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4A 5728 bytes
font_01_sfnt_off0000e2e1.bin
25fd32a244ad7873f4f72765ab7572f23656fd0bad3f690d47ea5e4a17d4900b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E1 10300 bytes