Malicious PDF — malware analysis report

Static analysis result for SHA-256 87bfc09adc1ff387…

MALICIOUS

PDF

81.3 KB Created: 2021-02-05 22:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0caabd7d73f1282c5fdcfbc14b4b93fd SHA-1: 9a6c37e589de1187cda9c28f8748cd27fc4831be SHA-256: 87bfc09adc1ff387f5ff5f696df4b24b74228473ccc60e6534f38a4a2527b01f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous external URLs, with one prominent URL being https://jacksth.ru/123?utm_term=rogue+assault+cheats+iphone. The presence of a link farm suggests an attempt to direct users to potentially malicious websites for phishing or malware distribution, aligning with the Spearphishing Attachment technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/123?utm_term=rogue+assault+cheats+iphone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412606/normal_6013a6027f238.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/ihXBv5T/viboderuruvot.pdfIn PDF document text
    • https://boxenujanazikof.weebly.com/uploads/1/3/5/3/135302290/8cd7d95104.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415068/normal_6006bf417be07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368762/normal_5fe9b7f351131.pdfIn PDF document text
    • https://raguwagoneneza.weebly.com/uploads/1/3/1/3/131384547/tagase.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/fTkxKjb/lezemow.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/wexazumasasoxaf-gakosute-kirefudokud.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/hiPXMid/wepazebafetirixokeg.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/bhdgeSG/galaxy_watch_3_vs_galaxy_watch_2.pdfIn PDF document text
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/46574.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/ijejcZN/making_international_calls_using_whatsapp.pdfIn PDF document text
    • https://dazenesulamese.weebly.com/uploads/1/3/1/1/131164173/godim-dodizekafeje.pdfIn PDF document text
    • https://bowemubunewoseg.weebly.com/uploads/1/3/0/7/130739536/d5a40d8a69e3b59.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/MNhc5jd/29289018718.pdfIn PDF document text
    • https://xufalawat.weebly.com/uploads/1/3/0/8/130814535/xonug-bovalozafodiva-takonet-jebisitudovu.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/mivumexadodafiw_relagaren_kudowazarixese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 4988 bytes
SHA-256: aef60f3f564877c7ff1489ca3e1d49fa82da4a818c5047231df7b8d7edc55021
font_01_sfnt_off000105f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F7 10636 bytes
SHA-256: c7f2596ee343fe3a8bd517e40ce28cc9587463c93804f025f065f6e95613e40d
font_02_sfnt_off00012a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A42 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.