Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5783012f8593ca…

MALICIOUS

PDF

94.4 KB Created: 2021-02-22 02:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0c04c403d1c7d21363c97a6138e62e9c SHA-1: 6f9b32ac57b1f5bedc218f5c61e533d2de84f1fb SHA-256: dd5783012f8593ca876620ae8959d6f45021d3ec36bcdb34084b50bb21989a71
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a notable heuristic identifying it as a link farm on disposable hosting. The document body, though partially obfuscated, suggests a lure related to a TV show summary, likely intended to trick users into visiting the malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/aws?utm_term=la+maestria+del+amor+resumen+capitulo+4 PDF link annotation
    • http://vsedlyatebya.xyz/467018489003dmt6.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/sisijisoj_jotevasumor_kiwidajufut.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/c4079bcdc7.pdfIn PDF document text
    • https://retinagarar.weebly.com/uploads/1/3/4/3/134319249/c3a6ca429585989.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/vLhgieQ/3d_castle_puzzle_disney.pdfIn PDF document text
    • http://wisecredit.info/ruxojexbgql.pdfIn PDF document text
    • http://kidepokapila.22web.org/mollweide_homolographic_projection_answers.pdfIn PDF document text
    • https://nuxowodevuj.weebly.com/uploads/1/3/4/6/134609076/jabedovutami.pdfIn PDF document text
    • https://cdn.sqhk.co/gitaligido/kijBjaJ/51828405190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_6027bbcc68c3c.pdfIn PDF document text
    • http://manybigs.space/wuvapy02qz.pdfIn PDF document text
    • https://cdn.sqhk.co/gobumavurob/wkig9nO/zaguli.pdfIn PDF document text
    • http://lami-lashes.site/75840545152s2luw.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/BMhdhjd/super_jabber_jump_3_android_1._com.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/papuja/aceite_esencial_del_eucalipto.pdfIn PDF document text
    • http://keputaxududot.epizy.com/kolibikutamiganime.pdfIn PDF document text
    • http://govegid.rf.gd/zawobewizaseribi.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/bunewomugamifijeguzopezoj.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_off00013422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13422 5248 bytes
SHA-256: a74c077df912653af7a2455616eb9313a8f8b9fafb9814cdf8ebd7912f3da8c8
font_01_sfnt_off000145ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145ED 12116 bytes
SHA-256: 460c7155a26e368781bc389c3b831ced96758e27b783b46a1ae3ffaac7363bc3

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