Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ab641272587c687…

MALICIOUS

PDF

60.4 KB Created: 2020-10-25 08:06:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 66252a0da5f7df91bc3300012fa39560 SHA-1: 0c8cca533b671be7846b01f21164fce9bcf0fcff SHA-256: 6ab641272587c687f9d71d95981a4a6271f6297e69ef5cdd6e735d301eee92f5
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ttraff.link/aws?keyword=miss+behave+book+pdf+free+download In PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/lipomemupixop.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/78f4c1a549b16.pdfIn PDF document text
    • https://xebivonejawaf.weebly.com/uploads/1/3/4/0/134096192/315aeb.pdfIn PDF document text
    • https://sonilotosoj.weebly.com/uploads/1/3/1/3/131379329/505aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_5f908650ebb0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_5f9125c28c4b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8f4dc9c71e2.pdfIn PDF document text
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/vekukifoluwupowone.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/meletopadolavuxutu.pdfIn PDF document text
    • https://zovijewef.weebly.com/uploads/1/3/4/4/134400079/tivavajugikuzobenude.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/zapadobe.pdfIn PDF document text
    • https://xaranetudu.weebly.com/uploads/1/3/4/0/134016810/setudow_vesixizoxosebum_tusatifire_siwobobuzulo.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/funuguji.pdfIn PDF document text
    • https://dokarugosili.weebly.com/uploads/1/3/4/3/134362608/4481516.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00008653.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00008653.bin)
    • https://s3.amazonaws.com/gupuso/jufalanexuzisi.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/polarity_index_of_solvents.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/steuerklasse_ndern_formular_nrw.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/peter_drucker_management_cases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e7aa74-d306-4f0b-b4b6-88c376539c44/roxaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77fc6446-1f36-4781-afbc-9b88fd014577/85035392549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78110ad-0c0e-46b3-b391-cfecc2426ec2/nomosipisubinawisafonufod.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 extracted file (font_00_sfnt_off00008653.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_03_sfnt_off0000ce24.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_03_sfnt_off0000ce24.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8653 5492 bytes
SHA-256: 626c66c1e68e0d14cf1d48f200413b0789e284ec25579080c0df530e4c57587b
font_01_sfnt_off0000990f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x990F 3808 bytes
SHA-256: 5a2a641555be94dd78e38b0937907a60e679ccec010cfe4fe412832be71ef72d
font_02_sfnt_off0000a7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7FE 11376 bytes
SHA-256: 6be1ba79f5dae55165c851b0f138be8b042e5afb4325dec6f45d523c41efb229
font_03_sfnt_off0000ce24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE24 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06