Malicious PDF — malware analysis report

Static analysis result for SHA-256 26efe28f450eb612…

MALICIOUS

PDF

85.0 KB Created: 2021-03-17 11:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5180bcbbeceae56a029a6473df8b0d27 SHA-1: 53e3033ed214ff984b2fb921d935a1983363e272 SHA-256: 26efe28f450eb61290f45b761f71dbf6410fbfa129f67b479c618f26118f36ee
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to reference product information ('Nioxin scalp shield sunblock spf 20') to disguise the malicious intent of directing users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=nioxin+scalp+shield+sunblock+spf+20 PDF link annotation
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/jojinovujo-sawilufivipo-vipazupexuxow.pdfIn PDF document text
    • http://afracheat6.xyz/327160450358ghu6.pdfIn PDF document text
    • http://expressvpn.store/979860770222s1xd.pdfIn PDF document text
    • http://xopuwigevifuk.iblogger.org/wezizazuxatu.pdfIn PDF document text
    • http://gupozatu.22web.org/achyutam_keshavam_song_ringtone.pdfIn PDF document text
    • https://talinupujisen.weebly.com/uploads/1/3/4/5/134591269/sibabujidiziwabofo.pdfIn PDF document text
    • http://webcam-model.online/namabasonorosakuja2xxkx.pdfIn PDF document text
    • http://7lessons.website/tri_state_bus_to_midwaybzyej.pdfIn PDF document text
    • http://gufutaca6.xyz/465955889706rxl2.pdfIn PDF document text
    • http://instofficial.online/juventus_fc_roster_2020jutjs.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://pidusuzelaju.epizy.com/82099782465.pdfIn PDF document text
    • http://kugunimekuxaf.epizy.com/powuxexilitovino.pdfIn PDF document text
    • http://ribuxuvotamu.rf.gd/carry_on_size_luggage_delta.pdfIn PDF document text
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_9bb5df5c7add425195b4cc3ef420785c.pdf?index=trueIn PDF document text
    • https://8ab1a2d5-e5b1-44c5-a28c-e09959565f0d.filesusr.com/ugd/eb712c_f3be523c5be5475fa7a8b1795cddc101.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
    • 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_off0000e8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 5464 bytes
SHA-256: f95da4ae2a9a4212885d4a99eafefdcb8ebfc39d7751fb235c1484674290c62e
font_01_sfnt_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 11736 bytes
SHA-256: a64846ef08cd884ed1e9821729b839947461258c5bbcb77d1cbb511620d6adee
font_02_sfnt_off00012380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12380 16148 bytes
SHA-256: 64f21e55c2f29c6f605e8f9fd96e7f7b34f9b4a26fdc717ddead948457370e3b
font_03_sfnt_off00013890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13890 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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