Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab440847eb6231a3…

MALICIOUS

PDF

85.6 KB Created: 2021-03-17 15:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d40196418c43b5636a7159d39ddf6e36 SHA-1: 2121855e643e18cb37a7dd87bbdeb8bec4b63dcb SHA-256: ab440847eb6231a30ca3d59336b5d3dcab582bd7b1d46666be8bca3a4fc66545
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 0.9991

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://jacksth.ru/wix?keyword=persona+4+yukiko+boss+guide PDF link annotation
    • http://contentmedialiteracy.com/84032442816o1phn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_604805fad6844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5fd1aadd2dc3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5fea31e26b5b5.pdfIn PDF document text
    • http://ukrinsure.com/ruzimizijez5fyi0.pdfIn PDF document text
    • http://koreanluxe.com/lapudaxawanadu7b2i7.pdfIn PDF document text
    • http://beliyden.xyz/einhell_msf_570_manual_snow_blower_shovelscufq.pdfIn PDF document text
    • http://instofficial.online/you_are_not_everyones_cup_of_tea_meaning_in_hindis05xo.pdfIn PDF document text
    • http://llloooodddd.space/30043725356tulzo.pdfIn PDF document text
    • http://tublitalia.fun/chrissy_teigen_cravings_collection_canadauute6.pdfIn PDF document text
    • http://health2health.online/getting_an_information_security_job_for_dummies_free_downloadvuw2g.pdfIn PDF document text
    • http://civiliscmq.online/data_science_course_syllabus_in_hyderabado63ui.pdfIn PDF document text
    • http://hyipinvest.site/tivotixowikodiz0w1qc.pdfIn PDF document text
    • http://sellforce.ru/how_do_i_fix_my_hoover_windtunnel_cord_rewindwkfza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417534/normal_5fcc5f18bbf22.pdfIn PDF document text
    • http://lotsmen.com/leave_a_light_on_piano_sheetqnt99.pdfIn PDF document text
    • http://vukufitu.mywebcommunity.org/car_park_rental_agreement_hong_kong.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418984/normal_603867582f8be.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/53517486419.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/adjournment_in_cpc.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/8441f272-70fd-46c0-9561-9b675dae86b0/telugu_bible_study_books_free_download.pdfIn PDF document text
    • http://vubelifijam.atwebpages.com/how_to_calculate_for_half_life.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900635c6-a8ad-45ae-96f3-85a4eb1200c9/gewasobagidemakosik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429d3119-5c2f-4153-b86b-003fec17de14/how_big_is_a_miniature_dachshund_uk.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_off00011149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11149 5356 bytes
SHA-256: 782a5cdebbb281a7be31aa563591ce989a42f98e85aa408410def9961f37cf57
font_01_sfnt_off0001239c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239C 10960 bytes
SHA-256: 48fe3bb116ef60b5f718fd66688b5b0e10d5eba26034942aa739456dfea31405

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