Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f8020babe47391…

MALICIOUS

PDF

71.4 KB Created: 2021-01-26 11:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9fcab8fbfcc08ce9cd34df20b9dda6a4 SHA-1: 72c1b9b70ccbbd06ffafad0a62026ba4ba7669f0 SHA-256: 65f8020babe47391775d16a7d9013cd7508c824d3752bd2e8f2781eb79c688ca
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm or a distribution mechanism for further payloads. The presence of a 'survival craft hack apk' in a URL and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/123?utm_term=survival+craft+hack+apk PDF link annotation
    • http://hydra.moscow/pinata_hunter_3tiiiq.pdfIn PDF document text
    • https://roxomikanu.weebly.com/uploads/1/3/0/8/130873860/0d0e9b6962ca.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/new_gun_shooting_strike_counter_terrorist_games_apkobvou.pdfIn PDF document text
    • https://koniwosusuzese.weebly.com/uploads/1/3/1/8/131856176/1837948.pdfIn PDF document text
    • http://vas-rem.ru/574617892938fadb.pdfIn PDF document text
    • https://peliretoru.weebly.com/uploads/1/3/3/9/133997281/zomategulu_petuma_fumugodupilazu_tifezumogavoki.pdfIn PDF document text
    • https://vigegenatiborig.weebly.com/uploads/1/3/0/7/130740049/vurigi.pdfIn PDF document text
    • https://mabobuloxulekev.weebly.com/uploads/1/3/4/6/134692970/9191667.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konevimojo.epizy.com/jixodaguromisir.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/64574069322.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/kuwige.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/exceptional_items_on_balance_sheet.pdfIn PDF document text
    • http://kirigawegugava.epizy.com/39715798601.pdfIn PDF document text
    • http://bolunivagoxel.epizy.com/62474611783.pdfIn PDF document text
    • http://vininotubosom.epizy.com/birdland_weather_report.pdfIn PDF document text
    • http://bewukikakew.epizy.com/fevobuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/xekif.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/bleeding_steel_2018_tamil_dubbed_movie.pdfIn PDF document text
    • http://vimonaker.epizy.com/catholic_charismatic_prayer_group_format.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/10565988349.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_off0000dbbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBC 5152 bytes
SHA-256: 0950b8fa334a10fed1d13133fbab84f57e881ec4ada40a44bbb99eadd6b3fec3
font_01_sfnt_off0000ed49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED49 10348 bytes
SHA-256: 69a6dbe7016ad1833c95a5586f28208cd8e44e6fa8593131cf4b49c2134d26b9

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