Malicious PDF — malware analysis report

Static analysis result for SHA-256 f179d910b19dc4e6…

MALICIOUS

PDF

75.9 KB Created: 2021-03-31 09:40:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3918125b9bcd2db654b84a6590d1946c SHA-1: b13cf9b5403444791c45f7720255468dfeb7e616 SHA-256: f179d910b19dc4e6f8c377e69a05f40b2e0304f2df650de70ff92dd089ade810
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 0.9995

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://golowaki.ru/award?keyword=belsky+experiencing+the+lifespan+pdf PDF link annotation
    • http://profaudit32.ru/xuzediwinijet50dte.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/xavodemurixe.pdfIn PDF document text
    • http://wojifos.22web.org/42180743505.pdfIn PDF document text
    • https://rigopijifotifat.weebly.com/uploads/1/3/2/6/132695828/6376894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_6052fa379ddea.pdfIn PDF document text
    • https://mokapojigum.weebly.com/uploads/1/3/4/6/134690111/bapukef.pdfIn PDF document text
    • http://ipatovaalena.ru/complex_sentence_using_an_adjective_clause1o4wf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_60622096b996d.pdfIn PDF document text
    • https://nituxokijawagez.weebly.com/uploads/1/3/0/9/130969825/5586761e9adc.pdfIn PDF document text
    • http://sparzha.club/lua_scripting_languagevi9c7.pdfIn PDF document text
    • http://lotupojaxuvutix.mygamesonline.org/71629672598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_605452d6be953.pdfIn PDF document text
    • http://vashmaster.info/how_far_do_the_walking_dead_comics_go_blindfqv8n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_60414a0550f65.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
    • https://uploads.strikinglycdn.com/files/ed7658d7-b64a-4f2b-bfbc-ed891cef7e1a/nazenuj.pdfIn PDF document text
    • http://xezogime.epizy.com/strat_o_matic_baseball_score_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a30cab-0c6a-4689-ab67-92592712e3c1/murray_lawn_tractor_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845e9dcc-d422-4f13-bbb7-e5b75c10caf9/uprising_by_margaret_peterson_haddix_summary.pdfIn PDF document text
    • http://nononulavojiki.myartsonline.com/biological_perspective_in_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b136d37-0ffb-436e-94f8-50ed188a9762/how_do_i_calculate_my_military_medical_retirement_pay.pdfIn PDF document text
    • http://jipudovisubu.rf.gd/92630201900.pdfIn PDF document text
    • http://zovixis.epizy.com/83557405602.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_off0000dd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD81 5380 bytes
SHA-256: 209c341686b255ffb3e9c2f390478f8d23103a6dfe6531e5cafce34a5be30350
font_01_sfnt_off0000efd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD0 10828 bytes
SHA-256: 71df9e6d02d63402d3055c9f2546fef9360136f0a55111adbb52da89f694e0ac
font_02_sfnt_off00011411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11411 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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