Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d7f6efba2a6649…

MALICIOUS

PDF

83.8 KB Created: 2021-03-29 19:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 10293c8b4886ae2b9fed0f2a503fbf35 SHA-1: 922563cc160de937358fa197cfa10b96f3c81d19 SHA-256: 64d7f6efba2a66491d60f516032fdc952b92b01ec5d1d8fd492d066eba74014b
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 0.9997

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
  • 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://soxebez.ru/strik?utm_term=what+are+the+basic+principles+of+engineering+manufacturing+operations PDF link annotation
    • http://lojapidabud.mypressonline.com/firofelovikojofikokegi.pdfIn PDF document text
    • http://reveruverof.medianewsonline.com/thomas_finney_calculus_9th_edition_solution.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/jhtTWjh/gelokew.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/JhiTAXL/19522500494.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/brgh03F/easy_mug_cake_recipe_healthy.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/pijadobexufisut.pdfIn PDF document text
    • http://pipavinekiga.mywebcommunity.org/letras_goticas_mayusculas_y_minusculas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460708/normal_5fd777ac1f662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490127/normal_5fc91c1d0ece5.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/tarefomenojafajijegi.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/ramadan_calendar_2020_lahore_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470207/normal_5ffb681c02a26.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480170/normal_5fede323c1da9.pdfIn PDF document text
    • http://popisazono.getenjoyment.net/bayesian_modeling_using_winbugs.pdfIn PDF document text
    • http://dosemamorozaj.22web.org/sfn_poster_guidelines_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bedopevidorofi.myartsonline.com/ipad_book_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/character_flaws_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/50502467642.pdfIn PDF document text
    • http://pulavoxojefu.rf.gd/29246183246.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/risk_assessment_matrix_template_excel_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 5464 bytes
SHA-256: 971acf1e0c803aaaec30c6eee0e475194a2a2792cced36d3f6e1c04678080234
font_01_sfnt_off00010e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7C 10160 bytes
SHA-256: 8559a26b8a6f30bad34e31eeafff815aaa9aa3a3856c6c247cde430c4f7f3c6a
font_02_sfnt_off0001311d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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