Malicious PDF — malware analysis report

Static analysis result for SHA-256 e82e6be1b053a1f3…

MALICIOUS

PDF

50.2 KB Created: 2020-11-06 10:08:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 2c976acaf157cb8e3d98a84d93b39d21 SHA-1: c7b2c2874dcb38436381e18296ba3bb98751d2f8 SHA-256: e82e6be1b053a1f395ebae0f33a53fb4bc62c54f125bcbed5b8ec84fe688d56b
136 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.
  • 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.
  • 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://traffset.ru/aws?keyword=cities+skylines+crack PDF link annotation
    • https://zitavumerut.weebly.com/uploads/1/3/4/4/134465292/sisan_jifudoboxeri_duragari.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/gomitamewegamigaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_5f9ba83a2f5ba.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/zafeb-tikugi-tuvopafi.pdfIn PDF document text
    • https://jumofawulagap.weebly.com/uploads/1/3/4/4/134486933/6002850.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/a9ba43d719.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/2941053d-545e-4811-bc0b-eeec4030fd58/15485393546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f7e1d0-7e6b-49a7-af77-61610048683b/gawuwetarut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/881fec9e-1f32-456e-ad33-460f3fadcfe7/95307712956.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_off00008493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8493 4864 bytes
SHA-256: f23ae60e469e7cc9c3a141049e5012333a2bd5cafa85b56041a49a7850e96c99
font_01_sfnt_off00009537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9537 11392 bytes
SHA-256: 056dcec6b32b3a51a54fc4975892ffdd3efb8110bbfefb379a48544ca6912d64