Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43c939cc565817b…

MALICIOUS

PDF

43.7 KB Created: 2020-10-15 14:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ee904b3eb7a652e9ed337f8cb487f361 SHA-1: 129726ced8e5b92c231d90a7f47644b32e36473c SHA-256: b43c939cc565817bf091bb3a055c4e95e91a19c1bf1c10336e80dfe257e5d54d
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://cctraff.ru/strik?keyword=how+to+insert+entire+pdf+into+excel In PDF document text
    • https://site-1038864.mozfiles.com/files/1038864/zetumiloves.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/9802156399.pdfIn PDF document text
    • https://site-1037160.mozfiles.com/files/1037160/78331009311.pdfIn PDF document text
    • https://site-1039668.mozfiles.com/files/1039668/87838222436.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/38669411477.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://fanavepuru.weebly.com/uploads/1/3/1/8/131871984/waxugozukidu.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/d96ddb407408.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/zaramevasitu_zexazivofulovap_tuper.pdfIn PDF document text
    • https://site-1040347.mozfiles.com/files/1040347/classic_wow_undead_rogue_leveling_guide.pdfIn PDF document text
    • https://site-1040507.mozfiles.com/files/1040507/poxunagamawugadexapafe.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/14155794125.pdfIn PDF document text
    • https://site-1043215.mozfiles.com/files/1043215/hiperemesis_gravidica_en_embarazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/3034dae2-61d4-4b34-884c-0c0b6d6e670c/jozebolujurutuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55575ee1-13fd-4e58-bf22-eea18c43856c/kopetitelinivowuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feb51017-dece-45cb-b5bc-736486a11a5e/jowaxipisib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ecc511e-cca6-494a-bdb4-fba3875592d4/galolivixa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b21fb3a8-c6f4-4e39-890c-cb00e2663266/zidatu.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_off00006172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6172 4848 bytes
SHA-256: c62e412e4f621889654cf26c2cfbcf6a71ec3e7ce815b4a49b2936922ea03632
font_01_sfnt_off00007208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7208 9712 bytes
SHA-256: 427030f5ba4f00af41414e9775c9d987519d981c3a3431f7271cd0dc1f9e6914
font_02_sfnt_off0000934c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x934C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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