Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3decd032a967374…

MALICIOUS

PDF

76.9 KB Created: 2021-03-16 15:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b147892843ca37fc8b3162771becaaa8 SHA-1: 5852f408334860210bd0cd29b0310bdd247e59bd SHA-256: d3decd032a967374309337438809a22bcdcfee8c19c6420ad7e3300fe9eddb18
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=histology+study+guide+answers PDF link annotation
    • http://bisapusid.mypressonline.com/apoplejia_hipofisiaria.pdfIn PDF document text
    • http://idealica-uficiale.website/can_obd_codestajr9.pdfIn PDF document text
    • http://present-mag.ru/can_you_join_the_navy_seals_as_a_civilianaji19.pdfIn PDF document text
    • http://salearea.pro/andantino_sheet_musicssic2.pdfIn PDF document text
    • http://1xbet-registrat.site/vineland_adaptive_behavior_scales_second_editioned56n.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/nasb_thompson_chain_reference_bible_large_print.pdfIn PDF document text
    • http://terem.space/aisc_design_guide_for_base_platesm11tj.pdfIn PDF document text
    • https://cdn.sqhk.co/bagadogod/hcvqigP/truck_driving_game_free_download_for_android.pdfIn PDF document text
    • http://lnstagram-copyright-supports.com/satezujepovunabonubetsfd31.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/obc_caste_certificate_format_for_central_govt.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/iiepIkB/78690463864.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/161_bus_route_schedule.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/77440608316.pdfIn PDF document text
    • http://akvatehnika74.ru/biopsy_report_of_breast_cancerfy5li.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/carboline_893_product_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/asean_integration_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75bf6ab-660b-4b29-9800-ad216f87efd8/bose_acoustimass_20_review.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/3rd_class_english_grammar_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830777b4-eb74-46c9-9754-ef43f300337e/lenenukevafimibopimiko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913c36d9-aa39-4783-8db5-8fe93bf0b167/30867159149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27eda155-5972-4a13-9cbc-f90a783ed344/friedberg_linear_algebra_solutions.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_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 5148 bytes
SHA-256: aab36661125d9b62dffc9e8a5b22f7448bb20228b1022621d1c9e165a694cb4d
font_01_sfnt_off0000ff59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 11448 bytes
SHA-256: f0e85580d15a65edd273c17460f92a7b22b5f6e42b44c02c03479ead8192f0ad

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