Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe41892ba8016082…

MALICIOUS

PDF

82.4 KB Created: 2021-03-23 15:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9d1bfecf1d460021ae343497dfa21122 SHA-1: 8807a3831ef107085edf8a667f6e08c1d1af4f98 SHA-256: fe41892ba80160823c455e681ebe7d1a1cace1ddd72c1a4d2a9cf7d245a737bf
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to manipulate search engine results. The primary URL, 'https://golowaki.ru/wix?keyword=wolfgang+puck+pressure+cooker+manual+bpcrm040', is presented as a search result for a product manual, likely to trick users into clicking through to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/wix?keyword=wolfgang+puck+pressure+cooker+manual+bpcrm040 PDF link annotation
    • https://xitipirobopu.weebly.com/uploads/1/3/0/8/130813988/2705676.pdfIn PDF document text
    • http://xuritepizib.mygamesonline.org/solidworks_manual_download_free.pdfIn PDF document text
    • https://wudusalulolatus.weebly.com/uploads/1/3/1/6/131606476/029d82798dca3e.pdfIn PDF document text
    • https://kajavowonedefa.weebly.com/uploads/1/3/4/8/134858644/fenadawojevex-xokogoj-detotur.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/gomufilozi_wixisagigeri.pdfIn PDF document text
    • http://vevebopawo.mywebcommunity.org/scanned_to_word_ocr_online.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/c4f0a.pdfIn PDF document text
    • http://figuxovutofid.mygamesonline.org/all_about_anorexia_nervosa.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/black_and_decker_toaster_oven_specs.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/0562296e-a299-4a2e-a383-bf251d345dc3/64350269451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd91073-e9ad-4dd6-a6a3-ca1b430348d1/repewulojumifujowil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb152587-05bf-4a14-a3d2-746c40582d39/how_to_find_number_of_electrons_to_fill_outer_shell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c151edd8-3342-4f19-95f5-f18deeafb08b/how_to_tune_a_husqvarna_455_rancher.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4baa7e25-6c36-4026-a038-9a32518a50f3/nowageji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4b5375-7b77-49c5-a0c8-067c963905e6/sojojabedonuzegawazop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b006da7b-1719-4388-8fb7-d12fff110d4e/59462691833.pdfIn PDF document text
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_69a0e724c08640ffa3904e9bb9511014.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae306f95-1136-4962-a9ca-6f00e4dc7956/2712947747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a825c685-b456-4fc9-8143-e90a097b313c/kuwezuzapegubifozuru.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_00ce23d0e9f8409faec5f15e2f44c826.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c012d98-49f4-4cc3-8f83-8cc46237966e/ariens_snowblower_manual_624e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f51207-4519-4b4c-8e24-655e2b375b8c/visesopebe.pdfIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_092e3b7deda04ccea9bd09efe9c0efa1.pdf?index=trueIn 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_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 5780 bytes
SHA-256: 0112e56a5011783a089216fd429546fe3680f67af6483ffb28668dd68023627c
font_01_sfnt_off000116f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F7 11020 bytes
SHA-256: 6a5e25921c61eebe11c90662c294996e3937632a2de7df8cf6b33cc15657d3ee

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