Malicious PDF — malware analysis report

Static analysis result for SHA-256 491dd717fdc390ad…

MALICIOUS

PDF

68.5 KB Created: 2021-02-19 23:29:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 05ae97c418a3cbeb496a77a9d18fab43 SHA-1: 887292b0fd6d8a2fee25a48a4e6946703467246d SHA-256: 491dd717fdc390ad074cb439264da6192d5e4131725275a71b0b8799655c8c3e
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/aws?utm_term=why+is+my+spray+paint+gun+not+spraying PDF link annotation
    • https://fuzimisadu.weebly.com/uploads/1/3/5/3/135319831/6267118.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/sezekuki.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/bidivo/asexual_vs_sexual_reproduction.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/siranipexobutipusaluk.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/labview_report_generation.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/free_pascal_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/74400168589.pdfIn PDF document text
    • http://xeravujowa.epizy.com/canadian_woman_murdered_in_jamaica_2021.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/nice_guidelines_menopause_2017.pdfIn PDF document text
    • http://piludid.epizy.com/6693149127.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/82705333086.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/89951485561.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/25728716843.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/defender_3_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/bedovujawurikidosad.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_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 5316 bytes
SHA-256: 47d91e8060aeb312ac37e654d7a8ad7566ac46ea90938bb1e06adbc790c00263
font_01_sfnt_off0000e342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE342 9928 bytes
SHA-256: eabe62cabb2d80482ed915a22b41870853525f931c471e1223ce093b7b532238