Malicious PDF — malware analysis report

Static analysis result for SHA-256 68df19387fc1eac9…

MALICIOUS

PDF

80.7 KB Created: 2021-01-27 00:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: bdb8b09842a876a770fcabfd47b6a6fb SHA-1: fa89bd4ffcd97ccfaa50ecd82591c9cab133a36f SHA-256: 68df19387fc1eac97c74d60ff1952a99e993cbe22f049b02dc560e732596b496
126 Risk Score

Malware Insights

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

The PDF file contains multiple external URIs and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'app lock for android tv apk', directing users to potentially malicious websites. The presence of numerous links and the ML classifier's high confidence score indicate a deliberate attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/wb?keyword=app%20lock%20for%20android%20tv%20apk PDF link annotation
    • http://malespw.xyz/70905430087fc0vz.pdfIn PDF document text
    • http://thedefenseforge.com/zowijifobuzatuziweyjne2.pdfIn PDF document text
    • http://comp-arenda.site/jesidakafowoduduvubafitewqcyd.pdfIn PDF document text
    • http://tlgfree.xyz/lurawerevo6efzd.pdfIn PDF document text
    • http://jomotew.iblogger.org/cds_2018_online_registration_form.pdfIn PDF document text
    • http://pedrons.space/sowulivewiwuxavorotuwumujvzr.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/jihcgfh/the_wolf_online_simulator_cheat_codes.pdfIn PDF document text
    • http://becloud.website/fovawukotodentyddr.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/ZuHNXgd/tajokobesoninodododogelen.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/lokijuronig/origami_fortune_teller_template.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/2097183620.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80D 5084 bytes
SHA-256: 6175abce1d3a33aa282fe62f51d2821a03b6fa75094a8ca430b326660fe06996
font_01_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 3696 bytes
SHA-256: f7c88a4d5af15d4fc672fb687f07d080dd78756feae6e91715e5857e53b159eb
font_02_sfnt_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 11184 bytes
SHA-256: f7032622ba763244d3cad00f07e8bf44e0e797c2c3e8971fc06e320ca5ef7f59
font_03_sfnt_off00011e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E43 16620 bytes
SHA-256: 7b41ed0fb31314a14408b2298962cb25f6a007d7ffd10ceb33ad6dbc24dc6059

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