Malicious PDF — malware analysis report

Static analysis result for SHA-256 2563f53fec56a963…

MALICIOUS

PDF

71.5 KB Created: 2021-02-24 17:06:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a03ddadfd01736ac51acc6a29e175077 SHA-1: 0695a27a50b90f04282081c84ad097fea9ede78b SHA-256: 2563f53fec56a9638784086602178e2822f10764d4cb185fed308b41895661f2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=counting+stars+mp3+free+download PDF link annotation
    • http://shtangye.xyz/5071828409924jg0.pdfIn PDF document text
    • http://goldstein.capital/hebrew_from_scratchu5cfx.pdfIn PDF document text
    • http://nisisigewu.iblogger.org/bluestacks_cn_60fps.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/honda_rebel_300_price_in_india_launch_date.pdfIn PDF document text
    • http://thailandlove.site/blackmagic_pocket_cinema_camera_4k_manualsmwap.pdfIn PDF document text
    • http://copyright-rules-help.com/46833126060ekfw2.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/63dab.pdfIn PDF document text
    • https://sigurapefudaji.weebly.com/uploads/1/3/4/5/134576843/1057031.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/avatar_comics_imbalance_read_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lemujiv.epizy.com/cribriform_plate_bone.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/pewulumugabokapaga.pdfIn PDF document text
    • http://dajajubofu.rf.gd/2539558397.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/munoxatuvoxotu.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_off0000d7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CE 5524 bytes
SHA-256: 41dcf4b6f7e817cd7990e9e161748de77e7d90df7e2e2cf87d4140572c97300a
font_01_sfnt_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 13288 bytes
SHA-256: 26e5e853cd81373b4d9bf5e3e2dd038f5f08d2fbf033a51631c629e27674a13d

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