Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f6d9b17d6050f7…

MALICIOUS

PDF

70.0 KB Created: 2021-03-05 16:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 589ac7046541fe83b3abba0ec9b5b46d SHA-1: e79026ca061b5b39f49e278731d676c2a311047f SHA-256: 67f6d9b17d6050f7a8b4888b898266b4339d9bb7e5849be6cad813d28f6a92b0
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many hosted on disposable domains, indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via the linked sites. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/aws?utm_term=why+is+my+asus+battery+not+charging PDF link annotation
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/2800089.pdfIn PDF document text
    • https://kojelujozifani.weebly.com/uploads/1/3/1/8/131856125/nitemomoz.pdfIn PDF document text
    • https://jufazikifu.weebly.com/uploads/1/3/4/3/134316902/e80d385.pdfIn PDF document text
    • https://vuvudosav.weebly.com/uploads/1/3/4/5/134579130/f39b17895f25.pdfIn PDF document text
    • https://bazusatibewin.weebly.com/uploads/1/3/4/3/134374280/796381.pdfIn PDF document text
    • https://womogidukiwu.weebly.com/uploads/1/3/4/8/134873304/893f9f9.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/a495fabfb0.pdfIn PDF document text
    • https://guvolobojifo.weebly.com/uploads/1/3/4/7/134733869/3955657.pdfIn PDF document text
    • https://fuvepuzineg.weebly.com/uploads/1/3/4/4/134463404/670078.pdfIn PDF document text
    • https://tudodamoziw.weebly.com/uploads/1/3/1/8/131872054/rimijojalisurem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480584/normal_5fd2f06632472.pdfIn PDF document text
    • https://jatufajikovuna.weebly.com/uploads/1/3/4/7/134719937/kitirora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_602a01b603da8.pdfIn PDF document text
    • https://repemokalit.weebly.com/uploads/1/3/1/8/131856723/2527170.pdfIn PDF document text
    • https://pifunugujo.weebly.com/uploads/1/3/4/4/134455612/nevuxeb-kadifaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_3f2a90def75949b18d9b998519cc64c7.pdf?index=trueIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_8bbcdeab34f64dd987e5015a67ad8ee0.pdf?index=trueIn PDF document text
    • http://tufobiwileke.rf.gd/82914528066.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_4cd413ed19864438b27d9010b1a9d85c.pdf?index=trueIn PDF document text
    • http://sudogirelokuf.epizy.com/alko_aks_2000_stabiliser_manual.pdfIn PDF document text
    • https://6eed613e-cbae-405e-b458-9655ef9033f8.filesusr.com/ugd/e4f6f0_4813f962e57140eda847f8cf70fa4269.pdf?index=trueIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_cea00bf59d204b6387f9b08b9c94ba33.pdf?index=trueIn 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_off0000d4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A4 5436 bytes
SHA-256: a3eb65875ab97334d05e5948be4083694468aed1b517bcc64fdfb54abd19a34c
font_01_sfnt_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 10480 bytes
SHA-256: 1d42c738e86397259980040f520ad32e27c7e013b2602afa7ef20f9b12281c35

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