Malicious PDF — malware analysis report

Static analysis result for SHA-256 bededa9f112dd678…

MALICIOUS

PDF

64.0 KB Created: 2020-10-11 09:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8dfbb13606534c5e83b225491fa747c7 SHA-1: 793581b82f51242a8aa0c0511f9f4eb83d00bd1c SHA-256: bededa9f112dd6781706e2c91c2ceacb30d2583b03004289f966493f6ab92463
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/strik?keyword=daily+use+english+words+with+tamil+meaning In PDF document text
    • https://site-1037029.mozfiles.com/files/1037029/lopamago.pdfIn PDF document text
    • https://site-1038851.mozfiles.com/files/1038851/17682523324.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/17807065846.pdfIn PDF document text
    • http://files.mycdaclass-unit8.com/uploads/1/3/0/9/130969663/xadilev_wivusagajix_muwev_lonuvujojoned.pdfIn PDF document text
    • http://files.furbabiesandfriendsphotography.com/uploads/1/3/0/9/130969841/0b0f3.pdfIn PDF document text
    • http://files.orchidbehavioralcare.com/uploads/1/3/1/4/131409074/falagupar_sukol_nuwizapavu.pdfIn PDF document text
    • http://files.alcmadison.org/uploads/1/3/1/4/131407148/julonokibazife_voxudabad.pdfIn PDF document text
    • http://files.radioafric-aye.com/uploads/1/3/1/8/131856326/noxudozek-mifaxekazom-menugunojumazif-vekenedufir.pdfIn PDF document text
    • https://site-1039875.mozfiles.com/files/1039875/74886265570.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/37127419722.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/6298675870.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/gadalewivazuguwawez.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn 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/4dfde052-3829-44eb-9781-0081abc88428/55013888090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a02e041-88e0-4c75-8e74-10db8dfa0cd0/magupebup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc800d78-d33d-4892-9be6-71b9ccb7bef2/ridimukusutisibesixi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000928e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x928E 17540 bytes
SHA-256: 513c2e3368c5a15562de660ec0e993b92e69e0c50b7dc8c78124c58f8dad7c8c
font_00_sfnt_off000080a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A1 5312 bytes
SHA-256: 72c673892cb39c3c00e2fd0e6c8f11bd0c643d2c76d8e58422785df12643a852
font_02_sfnt_off0000ba47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA47 13412 bytes
SHA-256: 241d9225fd1b8eadd2677cddade0f43048e7358ddbf18abb5307a63030a1ee90
font_03_sfnt_off0000e43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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