Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65876c9823cd8d7…

MALICIOUS

PDF

91.8 KB Created: 2021-03-20 22:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e324de25186c12e78fcb637022c3df85 SHA-1: 9a1d8e863133484930bc711679403aa6efe93709 SHA-256: b65876c9823cd8d7ec4027c36febb25bf88aeb4c3a0e650460a77fe45be9422f
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 0.9994

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/wix?keyword=ionic+or+covalent+bond+worksheet+answers PDF link annotation
    • http://pop-marketplace.ru/what_is_rash_on_babys_belly4h1jo.pdfIn PDF document text
    • http://particulieres-societegenerale.best/52220273914vsrup.pdfIn PDF document text
    • http://redita.fun/volume_of_pyramids_and_cones_answer_sheetk32ur.pdfIn PDF document text
    • http://vladmer.ru/dokuvilerekatusiwmzquu.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/ih6if1Q/igo_mobile_navigation_update.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/hfyCz62/birdland_san_diego_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/lirotigi/bjfgjhe/ny_state_tax_withholding_worksheet.pdfIn PDF document text
    • http://1offpark.xyz/how_many_pages_in_draculak0ftz.pdfIn PDF document text
    • http://adyga.site/79337009371nasb0.pdfIn PDF document text
    • https://cdn.sqhk.co/bifugudawesu/Zjgo3Eq/cold_war_beta_end_date_xbox.pdfIn PDF document text
    • http://maewallace.com/nomema2z8fc.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/f86d6e2f-3da9-46d1-9692-4483c0e819a4/ditokelupirazavibudu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a32ef47c-81f1-434e-b513-3423177083bc/ruwijisenitajaviged.pdfIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_34ff4f84ccab4e1eb1ffddb41ba06851.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/goviwigax/abrahaminte_santhathikal_bgm_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b2a004-5404-4291-9547-d35f5e29e062/libro_las_enseanzas_del_caballero_de_la_armadura_oxidada.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/illustration_essay_outline_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eb5b8a5-75ca-4b75-bfca-7e84cf323803/13480349311.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/publication_design_book.pdfIn PDF document text
    • https://d3df31c7-72fe-42b1-a92e-0723e8ed7a16.filesusr.com/ugd/5bf82b_89ad62d3d7134b248d0f06480b481917.pdf?index=trueIn PDF document text
    • https://989244f3-426d-4557-b4f1-0018dac9047c.filesusr.com/ugd/57c819_c23399fe52d64abf9641537e3d62755e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genijusemu/2011_honda_pilot_power_steering_fluid_change.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_off00011e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E0C 5108 bytes
SHA-256: 462fc484e6fcfd3ce4a13de73b4b6142fd879a5b86a240232a509595481f0830
font_01_sfnt_off00012f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F65 10612 bytes
SHA-256: 89008776e2203ea3d53ee9207cbda9be45b99bc68d8fdaa9c6aec3e1c78a7734
font_02_sfnt_off0001538e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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