Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2d789b36492eca…

MALICIOUS

PDF

81.0 KB Created: 2021-06-05 22:39:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 68d2d7896fe328b40dc2dd73c0e49b7b SHA-1: b8f0046201ed57e92d0e7439f3c25ad0901c4f6e SHA-256: 5b2d789b36492eca6457f3561e4dc9123b24c7de4e08bde15c8484fa4b6c50a7
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 0.9990

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/123?utm_term=inscription+wow+3.+3.+5+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463034/normal_6008c0b175b47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417525/normal_603577349691b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480149/normal_5ff9632080553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_5fe7852846cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427498/normal_6011c5b8b1981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414695/normal_605a695c5c235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_60521211f3263.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fc87d7072d10.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4450516/normal_60b75a5a3251a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453537/normal_6011dfc8cb1c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_604d119429f08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_60240022c8869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_605d961352b75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_60212d14cebe0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412159/normal_5ff133287d365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497079/normal_6063560ec6d75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasazejis.pbworks.com/f/how_to_connect_jbl_bluetooth_speaker_to_laptop_windows_8.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe209a1f-b9aa-4cd6-a5a0-c93478bc343d/rezevuxuporolotezufojasel.pdfIn PDF document text
    • http://joxupakager.pbworks.com/w/file/fetch/144490080/call_jojo_siwa_real_phone_number_2020.pdfIn PDF document text
    • http://kekirow.pbworks.com/f/maxefujoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b537eb-1b1e-4a94-a50c-572eaea5a248/92120558496.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ef3aeb-4249-4676-a5e2-d84d37654ad4/bozezivuxexif.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/how_to_do_a_hard_reset_on_epson_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2980bf-2edd-4c7f-9a08-a20fe082af06/3rd_grade_reading_comprehension_common_core.pdfIn PDF document text
    • http://kumarifili.pbworks.com/w/file/fetch/144638976/81873807667.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_off00010088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 5348 bytes
SHA-256: 671e6a30cef3ea26499b1abfae04ec65873d1916abf7ce82671aee7a2d63b486
font_01_sfnt_off000112e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E5 10280 bytes
SHA-256: 496f46093fac9973714dda3232ac3da00cfd91f47b9450c71e1fda34564f130c

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