Malicious PDF — malware analysis report

Static analysis result for SHA-256 d660c0c099773b98…

MALICIOUS

PDF

40.6 KB Created: 2020-11-09 14:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a6276678a5b6f87fbdc794f1d2f99d16 SHA-1: 0747bfe388509c68e43e19740f51086f8cbf202c SHA-256: d660c0c099773b988e8fd174e656b5807ca76089977600088baf97656829d4e7
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=register+of+deeds+for+randolph+county+nc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f88cde9798ff.pdfIn PDF document text
    • https://wopedibim.weebly.com/uploads/1/3/4/5/134585971/9efae629f830ac6.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/tegeva_totowix_suranid_sorenul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419642/normal_5fa8e075ed352.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wovexofek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f9b7cc951297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5fa3f14f49227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_5f882ee8f0f0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f873f3fdd9cd.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://s3.amazonaws.com/likadojivivofu/wufobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e55cf77-9e8b-4305-99c2-c767a3d0041d/pearson_envision_math_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/201a7d2e-97f8-4897-af68-d5cf8020af15/3603848633.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_off00004f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F74 5408 bytes
SHA-256: 7d618329ad11741180ac99ac300696edc6ac117d9c7c3187e7c5aedf1a9ac602
font_01_sfnt_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 10968 bytes
SHA-256: 53ca35e0f7786bdb9c7e9d41255b77c1ab45ef879d5ad182cdc5059bf382693c
font_02_sfnt_off00008750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8750 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361