Malicious PDF — malware analysis report

Static analysis result for SHA-256 d071fb0dabd4b4c1…

MALICIOUS

PDF

76.3 KB Created: 2021-04-05 14:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ea418c295f291fa156fbdca0c1eb4616 SHA-1: eec12810e003e3d82f29c6c6cfa1cc3d569b4b47 SHA-256: d071fb0dabd4b4c1cde75a587fcf137e9c78e0115560b7fe008889d9f7afa174
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, identified by heuristics as a link farm and flagged by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, suggests a lure related to foster carer payments, aligning with phishing or scam tactics. The presence of external URIs and the overall structure indicate an attempt to redirect the user to a malicious site.

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://vilenefex.ru/strik?utm_term=how+much+does+foster+carers+get+paid PDF link annotation
    • http://greatmasters.biz/dork_diaries_15_i_love_parispdtfy.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/20731833848.pdfIn PDF document text
    • http://tulumiv.medianewsonline.com/books_to_read_about_life.pdfIn PDF document text
    • http://priz24.site/34515318069daai7.pdfIn PDF document text
    • http://pornbustyvids.com/extremespeed_dratini_quiz_answersosr2k.pdfIn PDF document text
    • http://fezelegafefuv.mywebcommunity.org/sipuduxagosegeritononu.pdfIn PDF document text
    • https://gofexuzadefedim.weebly.com/uploads/1/3/4/3/134306088/nikalilafelovigavuli.pdfIn PDF document text
    • https://xijozidirosem.weebly.com/uploads/1/3/4/7/134712871/numil_nazevuw.pdfIn PDF document text
    • https://nedatukurugajim.weebly.com/uploads/1/3/6/0/136022322/gidav.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/a2f30042-d276-4c64-93bf-bbaf5ecaee6d/josafatelurogazo.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/women_of_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/gonavisuxuputubepuzonapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c0310e-31fd-4095-97dd-c799c4e4199a/how_much_does_a_database_manager_make.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/sudosivutazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ff94339-03e0-46c3-a339-b18e8841bc30/sewavobo.pdfIn PDF document text
    • https://4541bc1c-e35c-4de3-bb44-1f53c3e1a56d.filesusr.com/ugd/68f66e_f6fa9bee137b4c3f94c4b359bf96b728.pdf?index=trueIn PDF document text
    • https://307a23dc-bb60-4906-9a68-69e45957aa19.filesusr.com/ugd/d2057d_7790b662168a41bc8008eec07afbf913.pdf?index=trueIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_6f15ecd95d134dc49f1ea1c2a797b7fa.pdf?index=trueIn PDF document text
    • https://331e17ce-4321-42a7-89aa-067eaa3daeeb.filesusr.com/ugd/6576ad_b133d324180f4467a04c1bbbf6fa4387.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kabisebax/fmcsa_psp_form.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/89648830493.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_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 5588 bytes
SHA-256: 3e1e231479cb167ba16affde5b89adc13b39d3346e32e698313097c20f28fa77
font_01_sfnt_off0000ffbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 10504 bytes
SHA-256: 0929d9beeeaab37d077079bc6e33494573998582bed1d9b4e7c6369677c9d731

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