Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dac7100ca6fab90…

MALICIOUS

PDF

78.1 KB Created: 2021-03-22 07:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af3a9c5b609f65a3796bb4ef88def227 SHA-1: 9867248b47b4dd0c714403c3acb7496bb3a1bf62 SHA-256: 4dac7100ca6fab90c11671a5d1f643403659bb7a2c35fbff5203c5d7b21ab7dc
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 URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to educational content to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wix?keyword=work+and+energy+worksheet+mcgraw+hill
    • http://how2clever.com/argos_bedding_valance_sheetsrwq8i.pdf
    • http://tegor.xyz/zakotaletigodifekgt3c.pdf
    • http://ppl-nutrshopfit.website/football_games_penalty_shootout_world_cup_2016kkz93.pdf
    • http://sigisuzuk.getenjoyment.net/70670449691.pdf
    • http://nikaold.site/freedom_tower_elevator_hackwg8kj.pdf
    • https://cdn.sqhk.co/wosepimi/9sjdFru/xusemavikobudizosusek.pdf
    • https://cdn.sqhk.co/noxisoture/jihfjgA/nachiketa_all_song.pdf
    • http://zootime.store/what_is_pr_communicationx3rgt.pdf
    • http://bejisosubonito.sportsontheweb.net/armitron_wr165_turn_off_hourly_chime.pdf
    • https://cdn.sqhk.co/jesisuvov/CjigeH0/fomaki.pdf
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/dijuka-zijisufe.pdf
    • http://goxufedem.22web.org/53190818962.pdf
    • https://sopivumebisul.weebly.com/uploads/1/3/1/4/131413603/zavomokatikuxatemem.pdf
    • https://cdn.sqhk.co/rilowikapaz/jhiKhf7/naam_apna_song_download.pdf
    • https://fujazilumekopel.weebly.com/uploads/1/3/2/6/132681311/bcc89c13a6967cf.pdf
    • https://gudivolopuna.weebly.com/uploads/1/3/5/3/135346868/moxabofijafabukij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://modewomidoxiva.epizy.com/after_series_anna_todd_book_2.pdf
    • http://zorarovotasutot.rf.gd/essentials_of_genetics_9th_edition_free_download.pdf
    • http://dowuvoduwitovos.atwebpages.com/logitech_wireless_keyboard_k360_review.pdf
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_6a5b39791c57463ebef1f02245750e09.pdf?index=true
    • https://abc5f1b3-ad37-4660-b048-d9bff2240d70.filesusr.com/ugd/a1fb68_0d670d4b06f04c3b861937bdd8837d10.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_off0000f2db.bin
6ed283e170ca40ef08c28e0af1ad907bf351b9a239778f16ae65c198063c9143
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 5624 bytes
font_01_sfnt_off000105f7.bin
d15cee315e716f64400c3558f062500d120c5b7da0e4a4f8df110db0b40a8769
pdf-font-stream PDF embedded font (sfnt) at offset 0x105F7 10904 bytes