Malicious PDF — malware analysis report

Static analysis result for SHA-256 22abc7055e11fefe…

MALICIOUS

PDF

72.4 KB Created: 2021-04-24 16:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 66442841ecafd8c3cbccda489b89c820 SHA-1: 1749496a4dbbc872eeb447fed402a803870da1ec SHA-256: 22abc7055e11fefe0f2f62817858743404d56251b48b249eb2a2807c196dde64
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://dafemum.ru/strik?utm_term=forex+trading+strategies+pdf+download PDF link annotation
    • https://cdn.sqhk.co/gawagunikuw/jgeukhe/15784260785.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/leduluvup.pdfIn PDF document text
    • http://physcoo.com/19484644096ekdin.pdfIn PDF document text
    • https://cdn.sqhk.co/kojogitu/nJFrhew/84538101523.pdfIn PDF document text
    • http://boost-shop.xyz/65004812487zzyuj.pdfIn PDF document text
    • http://mugedly.xyz/693382150713qr34.pdfIn PDF document text
    • https://mipikarekegimo.weebly.com/uploads/1/3/1/6/131606279/tivuk_sizavoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_60355cf1d95c6.pdfIn PDF document text
    • https://xixekelubijaruj.weebly.com/uploads/1/3/5/3/135329585/nabik.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/hhgjhBX/sims_freeplay_cheats_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462035/normal_5fe27195bd71c.pdfIn PDF document text
    • https://sutivekawexebe.weebly.com/uploads/1/3/1/6/131636655/wojaduxar.pdfIn PDF document text
    • http://vodoroding.info/53875425707titzr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485696/normal_6012b77c5651c.pdfIn PDF document text
    • http://ourfutures.space/view_browsing_history_firefox_androide30kk.pdfIn PDF document text
    • https://sojagimizalafar.weebly.com/uploads/1/3/5/3/135317111/jadufusivufovuj_nenitis.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/a4a69720-03ab-440c-b1aa-c0af637b323d/15597845236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d07f742-686b-43da-a09e-d2e9a8d3648c/where_to_get_a_drivers_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f6e33a-d6d0-4496-8992-c4bc565cf469/cuales_son_los_primeros_sintomas_de_cancer_de_piel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46726b85-8c48-414b-8e25-e70f0b462834/how_to_make_simple_paper_box.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 5324 bytes
SHA-256: 4f2eb2cf44283417d0178d4ff7cce7aa98acec13d45799ea5547cac683104854
font_01_sfnt_off0000ee7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7F 11208 bytes
SHA-256: b0e5438dbe7a62c671c8b08d1e138d96c7c3bf9a0326e64b53968d1bdf7ed56f

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