Malicious PDF — malware analysis report

Static analysis result for SHA-256 38fa95b09409141e…

MALICIOUS

PDF

41.7 KB Created: 2020-10-02 09:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2e086b9875deb3036a30d3b69684bba0 SHA-1: 6a1c15bacf8b82edc36128560a0bbee24f5c9e9e SHA-256: 38fa95b09409141ed70571e55e8754ae0ccc3f0e81cc63e17ff124141ce16277
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://ggtraff.ru/strik?keyword=pokemon+infinite+fusion+rom+download+android In PDF document text
    • http://dezuwami.silvercabofbakersfield.com/uploads/1/3/1/8/131857920/7236690.pdfIn PDF document text
    • http://sepur.envirichment.com/uploads/1/3/1/4/131438641/562321.pdfIn PDF document text
    • http://files.chelseanswagner.com/uploads/1/3/0/7/130739780/7366711.pdfIn PDF document text
    • http://sujefabi.borobot.org/uploads/1/3/1/4/131453433/1a44cb0ed4baf2.pdfIn PDF document text
    • http://files.stjohnsmasoncity.org/uploads/1/3/1/4/131412362/8131878.pdfIn PDF document text
    • http://files.dbamainegroup.com/uploads/1/3/1/4/131407655/nipobegupukaru_nuzekepadon.pdfIn PDF document text
    • http://files.stonefoundationproperties.com/uploads/1/3/1/4/131454355/vijuparusawuwobiva.pdfIn PDF document text
    • http://piruw.veteransinformingveterans.com/uploads/1/3/2/6/132695615/331008980a65e74.pdfIn PDF document text
    • http://files.positiveposturenz.com/uploads/1/3/1/4/131483550/sivaf_polatafi_zuwovil.pdfIn PDF document text
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.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/5c6973e4-f08c-494e-8175-1efa216421b4/14432019771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d0ae8a-bd11-4289-92be-3788c43448df/sopupume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa2920f-998b-49fe-8ba4-2744e67bd6be/9004457397.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f9d91c-26f4-4f58-b2fd-15a423d2dd17/80226970855.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4420/8789/files/welexexesasomej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2200/2587/files/spider_man_pc_game_2001.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8069/1101/files/vaxupuduwagupir.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_off000063de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 5208 bytes
SHA-256: d4ed7b98364973e580e1334bb5ea5a0552739267e2bcb8218a4164f07bc5bcbc
font_01_sfnt_off0000759b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759B 10564 bytes
SHA-256: b9491c5052950afcd42fae905101c212233f834dfbd7c0ea12ac70b6e2c1e7cf

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