Malicious PDF — malware analysis report

Static analysis result for SHA-256 5952bd7cd62281ef…

MALICIOUS

PDF

80.0 KB Created: 2021-03-24 11:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 099bf2ff08ed32a1b71a907a20afb903 SHA-1: 6243765a07ec349946ceb5b9bfdee819ac717593 SHA-256: 5952bd7cd62281efa0c17fabde71a23d40d9427c60577e4a1e3bac2741e34993
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://golowaki.ru/award?keyword=les+apophtegmes+des+p%25C3%25A8res+du+d%25C3%25A9sert+pdf PDF link annotation
    • https://jupolojujilozas.weebly.com/uploads/1/3/4/5/134598947/5687407.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/ULibegg/97876808543.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/siaDpji/digestion_medical_term_suffix.pdfIn PDF document text
    • https://lirodute.weebly.com/uploads/1/3/1/8/131871659/f3119418bab.pdfIn PDF document text
    • https://sasozubavurak.weebly.com/uploads/1/3/4/8/134886198/mowoxitat_pavutewosiw.pdfIn PDF document text
    • http://burutevopu.iblogger.org/kobamabejut.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/present_continuous_tense_practice.pdfIn PDF document text
    • http://fonixeguga.mywebcommunity.org/46601864564.pdfIn PDF document text
    • https://cdn.sqhk.co/bezidexa/rRghgdT/axes._io_android_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gilebufamefaf.rf.gd/does_microsoft_word_have_flowcharts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9aacb69-87ca-411a-9e73-54f8b88ab6ba/79888277145.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_76d73e20242640c5be08c5f081f57998.pdf?index=trueIn PDF document text
    • http://zobuwijezad.onlinewebshop.net/bixefazekawokobuninafasiv.pdfIn PDF document text
    • https://0aed7b51-d02b-4864-a6bb-b478bb809667.filesusr.com/ugd/fbdaab_32e9cdec6ea64cf48398e090b0b4d08c.pdf?index=trueIn PDF document text
    • http://gajiresidar.epizy.com/fumozivasiz.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_eff1da8c45c7430ca5f071d611581fd7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4388c7bc-3e72-4e43-a7de-0a952e1376fb/92571932809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c663a408-e4a6-4867-af0b-7c5877d62264/nixon_unit_watch_battery.pdfIn PDF document text
    • http://bosagiriwamokin.onlinewebshop.net/58730543084.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_9bf2e66671db4606814dfa07f3a934b3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE922 3440 bytes
SHA-256: 34d39f49b4404ba89b1ea8d56909874a620cccb9bd81136753f85137b0520595
font_01_sfnt_off0000f56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56F 5648 bytes
SHA-256: c0ecc9764c23eb67b33767d657dcad24b2ac154919e3e6eae7001b4086099161
font_02_sfnt_off000107e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E7 12684 bytes
SHA-256: 004e8d2cbcf5b5b434b96383ec328313e34ea5f5f15fb3f01e582d5bd4851d0b