Malicious PDF — malware analysis report

Static analysis result for SHA-256 56bf5d26ceec2eee…

MALICIOUS

PDF

101.2 KB Created: 2021-03-29 01:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0c01c07b9479729e1f5ca718554e633b SHA-1: 1fcf060a81d609a05ed2887a7d75433cd2fba508 SHA-256: 56bf5d26ceec2eeead50ac4e7bf556d106bca68456794dbfb8d311467cb5bf61
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically disguised as a search result for a book. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=oxford+handbook+of+the+history+of+analytic+philosophy+pdf In PDF document text
    • http://keto-menu.online/btd_battles_unblocked_hacked56fai.pdfIn PDF document text
    • http://kamini33.ru/63236221526y198l.pdfIn PDF document text
    • https://likufuzojelawaf.weebly.com/uploads/1/3/5/2/135298946/7664576.pdfIn PDF document text
    • http://wrestling-mma.com/faliruzasepabar5ur11.pdfIn PDF document text
    • http://presentinsta.site/nipuxa72xzy.pdfIn PDF document text
    • http://hihikane.space/kofolofumoxexilajujutdoe9.pdfIn PDF document text
    • http://demask.fun/nervous_conditions_tsitsi_dangarembgaj30mx.pdfIn PDF document text
    • http://becloud.website/92036937943qjaii.pdfIn PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/gapefatazeforo_saviletobe_mupab_tolibeg.pdfIn PDF document text
    • http://usacreditmonitoring.info/giweluredepuxakokowakef9d5w.pdfIn PDF document text
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/piwavexujil.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/tedetiwedusapa.pdfIn PDF document text
    • http://salleapp.xyz/who_is_christian_grey_in_real_life2swxu.pdfIn PDF document text
    • http://myfavoritesun.xyz/being_peace_summarynotsw.pdfIn PDF document text
    • http://mixed-rootwork.com/42438232575bayur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/athoms_mbuma.pdfIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_5c9ae64c3b834982a6cf29698e06c1ca.pdf?index=trueIn PDF document text
    • https://e1cd7dcf-8988-4be8-9b1a-722367337987.filesusr.com/ugd/6203b9_da244f648b92420f909945b7753199b9.pdf?index=trueIn PDF document text
    • https://dd907c4b-492b-4b4d-bf3c-9f0b7a2bd2c7.filesusr.com/ugd/96a426_3b2cc53e5ed543f4a67ffed5dfec9b5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumuzu/what_is_argumentative_writing.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_3e73dab7dd1f45efa956f7a876508bba.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_off00014d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D28 5644 bytes
SHA-256: 0fa1c6ec499f68c50ef1cfed1be136128e5593cfe1a90b06f7febc4c28aeb49d
font_01_sfnt_off00016058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16058 11248 bytes
SHA-256: bb12d0da5ba4bb0e4374c9422af7a51c0ad72ed03aa2cd3b0d66d485b7765310

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