Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cc6cfaede8654e…

MALICIOUS

PDF

75.7 KB Created: 2021-04-16 23:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d0d128f916c45415f101b077ebd69013 SHA-1: dabbb36301f6c6bf3462048111fd25ea4e90dd25 SHA-256: 63cc6cfaede8654edff1d1ed77156d0eca6c9e4ba42c6ce4a4a163713d0daf28
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 0.9998

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://zajinet.ru/strik?utm_term=how+to+cook+maggiano%2527s+lasagna PDF link annotation
    • http://miromawetibikew.mywebcommunity.org/amazon_echo_plus_user_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491151/normal_5fe26a87d02ff.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/75817574588.pdfIn PDF document text
    • http://wojesukuzak.mygamesonline.org/english_grammar_notes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_604ca16c680b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480748/normal_604809d408412.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/48559887546.pdfIn PDF document text
    • http://kilewigi.iblogger.org/10_jazz_etudes_for_trombone.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/844d3a6e-d436-47c5-b0b6-e654c4573ea5/quasi_experimental_design_in_quantitative_research_example.pdfIn PDF document text
    • http://sawurawefivovo.myartsonline.com/business_english_advanced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc7ef35f-8f75-4e54-8203-fc9d85a9a757/emergency_short_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b0f22b4-0948-4fb7-bb98-785832be75c7/skyrim_alchemy_beginners_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66d42172-2b03-4315-a9f6-aeb6728bcbe2/tikona_internet_service_provider_mumbai_maharashtra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7c87ecf-f339-4473-8059-cafd4a2a33fa/practical_management_science_4th_edition_download.pdfIn PDF document text
    • http://dirulibas.onlinewebshop.net/livusoluparibisosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc23a2c6-97f5-426b-95b0-f9a9f3b85c0d/wafimujoduzopopikef.pdfIn PDF document text
    • http://daxevetefixidaj.epizy.com/broken_bow_lake_fishing_guides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80fafbc9-fc2e-41a1-873d-d97cb95a337b/doss_bluetooth_speaker_manual.pdfIn PDF document text
    • http://simolerifape.epizy.com/49925561015.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_off0000ea99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 5172 bytes
SHA-256: d1dff226bcd78e4c833a973fb6239bf2c44009ab24759ee15afc93957c12ed54
font_01_sfnt_off0000fc3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3C 10640 bytes
SHA-256: 20843f7803044d0fd9da3512f0025a25253a1d5b860345c0f50f9bb6ec5497c1

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