Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b8f4c7593b731c…

MALICIOUS

PDF

76.3 KB Created: 2021-04-04 11:48:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b9c8875d0ca00da689be99d4fa398e93 SHA-1: 731e1e61517dffb2b1bc5d57d68d976fb20be0c8 SHA-256: 88b8f4c7593b731c00b529bb43ef59c6f49abf06e6879ffbf69fd469ba024a61
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://dugedepap.ru/strik?utm_term=how+we+die+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426075/normal_601b60cca6a84.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/botorujet.pdfIn PDF document text
    • http://kugibut.22web.org/pamila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_6054ffb98dff2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455194/normal_5fc98d25673d8.pdfIn PDF document text
    • http://rogijowop.sportsontheweb.net/66870014492.pdfIn PDF document text
    • http://ferabugajefelam.mypressonline.com/concierto_de_aranjuez_partitura_trumpet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421462/normal_6045489068f1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofuzugavup.epizy.com/83721690555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/494140c3-892f-4235-89d9-055ff8cd58c7/xevaxotozufaj.pdfIn PDF document text
    • http://bofekid.epizy.com/space_jam_2.pdfIn PDF document text
    • http://dikuwunoxoxa.epizy.com/data_sheet_template_army.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bd5562-8797-47af-ad59-750e3a09de7a/wagner_paint_ready_sprayer_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0af524e-70b6-40a7-b676-058887f03024/panasonic_dvd-s700eg-k_dvd-player_hdmi_scart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7012d772-6a55-436b-a05b-161d27e24292/55660567617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57634d7-2682-4e09-b2df-eabc33939f84/1576991137.pdfIn PDF document text
    • http://rojanesifilagu.myartsonline.com/edgar_allan_poe_poems_the_raven.pdfIn PDF document text
    • http://sapifux.epizy.com/fodujujoxejokogekof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be63786f-1f7b-45a9-9c52-8cba68338e98/bojasevetijudonip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55322476-94d3-4d1a-bc84-5e3a481828e8/vulafefekevovetubutuvuruw.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_off0000f125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF125 4572 bytes
SHA-256: b8585b8bb5350933905312a742026537dfc15dd6a7b08b6fbb655c99766ce57e
font_01_sfnt_off000100dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DD 10376 bytes
SHA-256: 03cd8c53137cba5b88b5a20f33983d975f30596aa67afcbb03d03843b1f2203a

Open this report in the interactive analyzer, or submit your own file for analysis.