Malicious PDF — malware analysis report

Static analysis result for SHA-256 081d41b0a77081da…

MALICIOUS

PDF

68.9 KB Created: 2021-02-08 22:42:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b5b285f19b68ca5b865f91b32055791e SHA-1: d08ae7e7c23a12bd8e10aca167265f56614a8598 SHA-256: 081d41b0a77081da2d7c8caaff339ad5a1b32761aa78acd4265fd529e5c5edab
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=forming%20abstract%20nouns%20pdf PDF link annotation
    • http://italywow.pro/wedotimzc747.pdfIn PDF document text
    • http://leaninrzpd.site/message_app_for_macbook_proyn50o.pdfIn PDF document text
    • http://trikotoria.ru/43825438435yo9ob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_600b1aab74e83.pdfIn PDF document text
    • https://kezidixujaroko.weebly.com/uploads/1/3/4/0/134040737/tusazigijulu.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/7473027.pdfIn PDF document text
    • http://tumbaa.space/97247531936hgcap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tomaxade/hallmark_movies_on_roku_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/bhavageethegalu_kannada_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/loyalty_program_terms_and_conditions_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/chrome_freezes_at_0_seconds.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/nesudelibid.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/camponotus_ligniperda_formicarium.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/nutrition_information_burger_king_nuggets.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/95802976533.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_off0000d086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD086 5540 bytes
SHA-256: 1435f60df9f789cd5e187c0422dd3ae2ac4c1e174c7514f9a61b244e61072327
font_01_sfnt_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 10552 bytes
SHA-256: 5275393173ded2abf21dddf25590242a3e86e32de75bc6056833fd583ada8c4f