Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7df49e63ef094f…

MALICIOUS

PDF

40.1 KB Created: 2020-11-08 06:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c953ea1cdeb239e45d08e527607cd6a6 SHA-1: b2a67e5014db6f8eafdc9d092bd86cde172a2e38 SHA-256: bf7df49e63ef094fb5098043acae5f6b8da3c1795065f42363af278f4a173088
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffe.ru/aws?keyword=gray+elementary+school+las+vegas+nv PDF link annotation
    • https://jawifimubagibe.weebly.com/uploads/1/3/4/3/134310986/e44813bc6.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/zunanukajajos_goref_piwegazogex_tubuturutapu.pdfIn PDF document text
    • https://dajapofijakaf.weebly.com/uploads/1/3/4/2/134266914/ece8ba3d.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/4f65369.pdfIn PDF document text
    • https://netajowazowu.weebly.com/uploads/1/3/4/3/134325029/8595287.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/fae8afce-9b33-4e4e-b617-5368de24f4df/74622377059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebdfa50b-5737-446d-ad4a-c13b3acda371/54648066168.pdfIn PDF document text
    • https://minezonateta.files.wordpress.com/2020/11/ethics_for_the_information_age_6th_edition.pdfIn PDF document text
    • https://jonitolatej.files.wordpress.com/2020/11/electrical_drawing_symbols_in_autocad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f821a849-b39f-495e-88f2-8b3585a776bd/perfect_viewer_plugin_apk.pdfIn PDF document text
    • https://zimozilobu.files.wordpress.com/2020/11/milivitusimowigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64eb1d29-bf99-423d-bffc-40a55a36e539/37714782769.pdfIn PDF document text
    • https://luwetinizu.files.wordpress.com/2020/11/tuxasij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50F2 2900 bytes
SHA-256: 9c84aca5171cf4522e1fd23f3e5391e17c8e645cdcb740b4c3036af6865bd014
font_01_sfnt_off00005b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B37 5408 bytes
SHA-256: 5781620a96b29312dbd5972f4283a4013c128dcdd2bcb143743baaefab859040
font_02_sfnt_off00006d80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D80 11328 bytes
SHA-256: d6b29fe15415453b8d631ee784201ef69a49c8274fe72984cf1467c0d9eac47b

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