Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7dfa9839236d6ef…

MALICIOUS

PDF

77.6 KB Created: 2021-04-19 22:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ac5b48d5a7d85cbe0c000f3a988a424a SHA-1: 7078c6e6f67740a55df57746268e53b88bad6821 SHA-256: e7dfa9839236d6ef3ff145d80a74e2f5c7330553caf10a479dd211f0eda0a816
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 0.9993

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://druttle.ru/strik?utm_term=how+to+adjust+the+tension+on+my+sewing+machine PDF link annotation
    • http://wupidubame.mywebcommunity.org/devedonofigobuvezape.pdfIn PDF document text
    • http://bagawixaj.mywebcommunity.org/project_business_case_template.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/how_long_for_ribs_in_electric_smoker.pdfIn PDF document text
    • http://jerunuju.mypressonline.com/dokunebufevosoxo.pdfIn PDF document text
    • http://nubatevujonuw.mygamesonline.org/upsc_prelims_2020_answer_key_paper_2.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/33403868770.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/bmw_4_series_convertible_owners_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f279d7-015f-4e4e-b837-0fffc529da47/instep_sedona_bike_trailer_manual.pdfIn PDF document text
    • http://xokutamewa.rf.gd/mowolebuxipageralaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecab090e-89fe-4a2c-ac28-c953845371b9/pegejufibalirezijew.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/cal_mol_to_kj_mol_converter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b7fd2b1-cd3b-48be-88dd-8716d58cc050/pegasus_tub_faucet_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9d55de-b69e-42d8-847d-7dbaca009edb/26189295602.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/74275101284.pdfIn PDF document text
    • http://getewubajup.epizy.com/kusalodab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1252fc3c-3ca5-415b-b667-1cf5c465ef84/92604892220.pdfIn PDF document text
    • http://sekuwomexapa.myartsonline.com/hobart_meat_slicer_model_1612.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/masanitizukidaz.pdfIn PDF document text
    • http://kisutajanarij.rf.gd/chennai_express_movie_filmywap_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/wow_classic_gnomeregan_quests_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a98c7a2-a0f7-490b-a0f3-f009915a6235/87777522183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f259f379-d8f1-4ef9-87f4-b003a97a8da3/fender_hot_rod_deluxe_iv_vs_blues_junior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0009ed8c-d3c0-4341-a834-b0851f83731b/what_is_the_survival_rate_of_coronary_artery_disease.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_off0000f139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 5456 bytes
SHA-256: 1401788104305f85804e2a8a9134d245a9794e7c75bb528af6a76afd83e094d9
font_01_sfnt_off000103c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C4 10232 bytes
SHA-256: 8ed4c5c5290476961314a283891f2d01c0344012bd4e91c0a231902d456271a4

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