Malicious PDF — malware analysis report

Static analysis result for SHA-256 f88f80ca922c4c38…

MALICIOUS

PDF

70.9 KB Created: 2021-02-05 00:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5dcaea192be4b851d9f303490b170f97 SHA-1: 0c5496ac9f258d4e95db8e7b364053b205f2f786 SHA-256: f88f80ca922c4c388c97c6559d8c93c96ea12bbde54ebdfb3de31caa37d9f6b5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=chamilia%20bracelet%20size%20guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4502698/normal_5ff21d9f0d18b.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/vugiselaraxisi-bomadinodorusek.pdfIn PDF document text
    • https://nalokulomegeze.weebly.com/uploads/1/3/4/7/134758193/01c8d5d09.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/windows_xp_activatornk1dw.pdfIn PDF document text
    • https://jaxoruxevag.weebly.com/uploads/1/3/1/6/131606876/9126486.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456378/normal_601b3ee6b5c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5fd7df8656c35.pdfIn PDF document text
    • http://segwaywheelchair.ru/64496511781tebec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gawekavadave.epizy.com/tolimiviliv.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/lozetipuzemapa.pdfIn PDF document text
    • http://botalibinizor.rf.gd/97270498646.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/56604364306.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/18881305723.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/vsco_fullpack_gratis_untuk_android.pdfIn PDF document text
    • http://matufuw.rf.gd/skills_practice_angle_relationships_answers_1-_5.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_off0000d900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD900 5448 bytes
SHA-256: ea7f66dff23f77a639fb4dc4f06881b1cc9fa332b6a1e3453b0bec275bfb34a5
font_01_sfnt_off0000eb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB57 10548 bytes
SHA-256: 4e2c3df18aa7f28375b625567619eb3eed058a1d3862b448411a59b4b183504f