Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8781e677e9ba82…

MALICIOUS

PDF

85.7 KB Created: 2021-02-25 04:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f10bf2a8cea6ab97995d89667f47a591 SHA-1: d98d6350aea6b2123837a48d3443a323c4b63ff8 SHA-256: af8781e677e9ba82a93c5de254c0ea183b3b2603992add2650a82c8f7494732e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a malicious domain, disguised as a study guide. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs points to a common phishing or downloader pattern.

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://druttle.ru/wix?keyword=chemistry+1+final+exam+study+guide+answers PDF link annotation
    • http://pomanonorajalam.22web.org/13730752392.pdfIn PDF document text
    • http://wimazosuwoxugij.66ghz.com/latest_memes_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/9sghx1I/88425504113.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/cigch5r/96272501033.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/mgef5jb/kufug.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/fcISibF/poxaloxibuworewowemugima.pdfIn PDF document text
    • https://cdn.sqhk.co/pedagukar/6GOm7id/black_short_hairstyle_2019.pdfIn PDF document text
    • http://wexixexebasober.22web.org/adobe_photoshop_cc_2015_camera_raw.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/d1jeggW/who_got_man_booker_international_prize.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/Xkifgic/221540731.pdfIn PDF document text
    • http://tunezazetadu.22web.org/commando_2_full_movie_bluray_print.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/woxotopapozokev/spoken_english_online_video_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/fifa_20_ultimate_team_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/danny_gokey_give_me_jesus_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/babysitting_ad_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/jariralawapadatat.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/discovery_turbo_channel_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/latest_android_oreo_phones_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/sowinoxididigozemurogon.pdfIn PDF document text
    • http://tejusadesivuti.epizy.com/guzatojotisobenufumovowi.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_off00011169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11169 5540 bytes
SHA-256: 355798d18c72e47d3c26bcd96d1a374a7740f44fe2a2a7f59672cbed45091a7c
font_01_sfnt_off00012434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12434 10824 bytes
SHA-256: 6a35a3f84bb85725cc3341ea9566867307042a41ea793d9e3a6e20611ddc31be

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