Malicious PDF — malware analysis report

Static analysis result for SHA-256 5deb30af48127d9b…

MALICIOUS

PDF

69.7 KB Created: 2021-02-15 17:36:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7f49ca24eec27ece02dd0b39099f8348 SHA-1: 68c38160ac9a900f26f180047fac8987bbcd20b7 SHA-256: 5deb30af48127d9b95410a2299b39867569a55763db2af4ba55bf3273b940a99
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=nra+basics+of+pistol+shooting+test+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423714/normal_60293687d0c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_5fd5fe1436cc4.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/gy3jejg/puwuvasovimubored.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490725/normal_60187ccb2affb.pdfIn PDF document text
    • https://timelasabo.weebly.com/uploads/1/3/4/3/134345700/topurudi-zuzemuwa-kozusajawaguza-pidelavet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369162/normal_602a0d7985560.pdfIn PDF document text
    • http://abistrans.ru/kavuxapavutagalzvm0x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_602909b907ded.pdfIn PDF document text
    • https://bojomuse.weebly.com/uploads/1/3/4/4/134462584/wiboja_zebiranof.pdfIn PDF document text
    • http://remontlegko.info/21609676594q0oyd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://datidogebe.epizy.com/19262231210.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_off0000cbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB9 5476 bytes
SHA-256: e4886e30dbf21ccbafbc2a69356a87b03a0eb97f482a1b70612abec72286d3ca
font_01_sfnt_off0000de64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE64 13892 bytes
SHA-256: 78b2a76aa5a8e97c667f1ccf336f43d9516b7661014519f245ce926f74866981