Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bfa9cb58655a35…

MALICIOUS

PDF

90.0 KB Created: 2021-05-04 16:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d92fc8b68e2ca1ca72247b2f928e1b89 SHA-1: a7f8d44fefb463492c59e8ad4afdc6c2917ea2ad SHA-256: d0bfa9cb58655a353035ab39742841b036b135c8e45e20c8565ca986bffc7a10
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/strik?utm_term=andrew+loomis+book+creative+illustration PDF link annotation
    • http://lezobul.medianewsonline.com/loxubinev.pdfIn PDF document text
    • http://rojepaj.iblogger.org/46083060945.pdfIn PDF document text
    • https://cdn.sqhk.co/lagidexetin/cKs1rjj/installment_note_payable_journal_entry.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/ghfHgqp/no_man_s_sky_multiplayer_base_sharing_2020.pdfIn PDF document text
    • http://juxisuzuvu.iblogger.org/880157988.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/qsphbha/word_search_pro_daily_puzzle_answers_hobbies.pdfIn PDF document text
    • https://nulepapilix.weebly.com/uploads/1/3/5/9/135957677/xavokelu.pdfIn PDF document text
    • http://puduvab.sportsontheweb.net/curriculum_vitae_examples_south_africa.pdfIn PDF document text
    • http://xovuwowim.mypressonline.com/33132913958.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/7706751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_bf7476708ea7441dba3ed3f8cd44cd2a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3081d538-3658-4d27-8a3e-20a4b67b2d94/is_raw_uchigatana_good.pdfIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_b0b82a6c0a494bc6a155b0178433d5ae.pdf?index=trueIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/47645261621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bb26d64-e93b-4833-8c9b-ff353fece501/how_to_study_for_gate_civil_engineering.pdfIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_9ad2c41f82114500b129c00d5bcd42f7.pdf?index=trueIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_9002fb69e93a487882a3fcb09eeeb70d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce587532-2b1e-4ca5-b610-f658ffcfd9a1/has_it_ever_snowed_in_sarasota_florida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459c39a6-fb0b-4538-8784-0dc144b76374/why_has_my_dyson_head_stopped_spinning.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_c17abbda7dc148ef9aa993a87384f3c3.pdf?index=trueIn PDF document text
    • http://rulamiji.onlinewebshop.net/83315545608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714f6e2f-f256-40e9-93d9-91c9d2d0eb7c/65253753130.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_off00011a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A80 5428 bytes
SHA-256: 4eb911aff903fd3ad369856ffba8e11664ffcc99c21760e838236cabd0716486
font_01_sfnt_off00012cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF5 14492 bytes
SHA-256: 122b5e80cb7d9dfc8efec98e65af4b9bb648c6ebbcc01ff7df1f1e149778ce16

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