Malicious PDF — malware analysis report

Static analysis result for SHA-256 110313b52380a76a…

MALICIOUS

PDF

42.8 KB Created: 2020-11-05 02:34:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d0fe99068d172e519e9c7e3c30eb844f SHA-1: 0ab0fde9784564b4e663475832bdd89472d1dfd6 SHA-256: 110313b52380a76ab3166e39c14ba115d4bd3417e4b70b83a6ff8b60a76a9c51
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.me/123?keyword=uno+unblocked+games In PDF document text
    • https://vorabatuzawudun.weebly.com/uploads/1/3/4/5/134582038/4103146.pdfIn PDF document text
    • https://xulavuxedipi.weebly.com/uploads/1/3/4/0/134017657/merivexozixaxoj-werapokuvereta-dabatosulowog.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/jaxedizedu_jitiwimu_sowemasope.pdfIn PDF document text
    • https://netokuwusava.weebly.com/uploads/1/3/4/3/134384506/5506357.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/zodutobo_mevibores.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/1bf83d89-52d1-491f-97f1-82415d3ffeda/richmond_county_nc_register_of_deeds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93a9c0f-3f2b-44da-87ee-3b84a2fd1c1c/jitodedojigubufogumisuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3043a412-4bc4-4eb9-ad8d-524456291631/robert_mantran_lexpansion_musulmane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a91358-e7e9-416e-a4dc-1787dcabb7d7/nezefobune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85aa0d2b-82f4-4f36-859a-40dc147ddcce/32117194366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f4cff2-e5e6-4161-82ff-ba1d81ea37db/jugusugasima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaeae73b-a7f8-4cd8-8cfa-a3829919a740/kigibovuwipagokebefiri.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_off00006811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6811 5356 bytes
SHA-256: ebd237843094cac7460548b46ee1d5039ad39a1ec7c19931bcb6f18d64e9148b
font_01_sfnt_off00007a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A41 10800 bytes
SHA-256: d08f268235850209ebc06a955fd771104e37fe9d102ebba40eba6b11e2c0f291

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