Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc0fb517fefd970…

MALICIOUS

PDF

41.7 KB Created: 2020-10-10 11:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 29f962d11a9e311a85efc0959edbf2db SHA-1: 0016d08270658e0b8454485a795f7ad6de2f22bf SHA-256: acc0fb517fefd9706e1f9cc1469dd0373bf6f2ea035ec15774c11d2141b9d52d
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/pify?keyword=trane+xe1100+parts+manual In PDF document text
    • http://files.thirdgradegenius.com/uploads/1/3/1/3/131398526/078aa46121.pdfIn PDF document text
    • http://files.melrockworld.com/uploads/1/3/1/4/131406934/31cf418.pdfIn PDF document text
    • https://site-1036814.mozfiles.com/files/1036814/tivodowes.pdfIn PDF document text
    • https://site-1036733.mozfiles.com/files/1036733/61824478131.pdfIn PDF document text
    • https://site-1038954.mozfiles.com/files/1038954/japaxumaj.pdfIn PDF document text
    • https://site-1043882.mozfiles.com/files/1043882/30435283919.pdfIn PDF document text
    • https://site-1036628.mozfiles.com/files/1036628/dasofomigebuwasewokazid.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/ae10fb9f-bc17-4b58-93f1-5c6ecfa4704e/wugubevizej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f9bd56-8030-4282-9e72-0eb7506f3ca6/60137997190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6866d231-e95e-419a-9eee-92dd4b9a11d6/dulilaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a8e7f9-804d-46e4-9862-9c7184c6572d/19997977104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efdf3994-579d-4a99-bd04-42bd99e5fc58/pukuripinukudolefaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ca7ecf3-77d2-4703-9697-002cb48d0307/57695370941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22551b1c-9290-4605-a6ff-ed033c1964b1/63766105259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbc2c96-45fd-412a-9361-5377bb58111e/73376915449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e49179-20df-4b51-8ffb-ad856777ed77/63030005396.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_off00006533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 5176 bytes
SHA-256: 72d68069e83b58b9e142b5aceeed152eeb9bafe01fe50441744b10b54e40cae5
font_01_sfnt_off000076bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BC 10384 bytes
SHA-256: e362cbf200fd4af27fb19a480244a4aeb21583e724fcbef86dda248b546d9d6f

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