Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c51d93a9ba22bbf…

MALICIOUS

PDF

79.6 KB Created: 2021-02-04 01:49:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d622c915c7603ed5317ce8a0b1d587f0 SHA-1: 98e2adef7c137f365e5253126d04338a834de690 SHA-256: 5c51d93a9ba22bbf4c3ad2c2ca0a55e1bd77fcf743a88669220401a3dafe506c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=employee%20appointment%20letter%20format%20in%20word PDF link annotation
    • http://makamar.online/442946278940o109.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/4896488.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454286/normal_5fed99325255b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5fd64b0da1ed2.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/2807425.pdfIn PDF document text
    • http://jazajozem.iblogger.org/volovit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5fc969dfc0f3e.pdfIn PDF document text
    • http://natur-green.fun/aisc_13th_edition_manualzvp1k.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/xelemedadagiz_mepamol_mujikole.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414495/normal_5fdf62148c89c.pdfIn PDF document text
    • http://banolapisa.iblogger.org/2434279556.pdfIn PDF document text
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/a09721f0750a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_601ac2c82af7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365586/normal_600460720fa67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ketanuviz.epizy.com/amoled_mobile_wallpaper.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_off0000fbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBD 5160 bytes
SHA-256: 7594ead5e7fd8402856e0803394ce8362c47fb834d8cc61274e64227947c0aec
font_01_sfnt_off00010d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D53 10640 bytes
SHA-256: c3fd57902930fae3145873a01e7fae5315745ba8d2dd218a9f5055310489bc1e