Malicious PDF — malware analysis report

Static analysis result for SHA-256 679b4029ce565397…

MALICIOUS

PDF

74.8 KB Created: 2021-06-01 04:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2adc1640ae7c77562667490d7cf41b38 SHA-1: c0fea4b21eab9f8e4a0c4921dd59f4bbc44b9822 SHA-256: 679b4029ce5653979f26984f0f8c79a6a9e16f05fec1de9d4c93e5f10b215e39
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'golowaki.ru', which is likely used to host malicious content or redirect to a phishing page. The PDF's structure and the presence of external URIs suggest an attempt to trick the user into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/123?utm_term=friends+anne+marie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471256/normal_6058bab31ddee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390081/normal_5ff42647196ba.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4408336/normal_60b58ce122e18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484821/normal_6067e4a6e8ac9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500897/normal_6036ad17ca06e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373983/normal_5fe0cab7099dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393624/normal_6001cf2c427de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_603ac57e899f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454056/normal_603c4027e2dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_605b7e8a6ff80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_606d029eebf2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6aa6bbf-334d-4ee6-a944-fdf353bae707/diana_gabaldon_outlander_series_book_8.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144422151/malaguena_salerosa_sheet_music.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/dafadesoxugivujazuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc71fe0a-a993-4b2e-a884-8b679788a9b3/21049311984.pdfIn PDF document text
    • http://midevodimu.pbworks.com/w/file/fetch/144432828/convert_18_kn_m3_to_pcf.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/miraculous_ladybug_season_2_episode_1_mp4_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fefd617-6877-44a3-9530-dbce5bd4856d/how_to_connect_a_sony_remote_to_tv.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/w/file/fetch/144434100/bisamutuwosabasupet.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43D 4892 bytes
SHA-256: ddadb85e9565d2f8324b7568f7f71242f7c4ab555e463d75c23474d3a549ff65
font_01_sfnt_off0000f4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C9 12300 bytes
SHA-256: e1cbdd67ce6f79be309609150dfef427187a599ee37784a3686caf8fbac0cd71

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