Malicious PDF — malware analysis report

Static analysis result for SHA-256 a385e633e1ec6eac…

MALICIOUS

PDF

72.9 KB Created: 2020-11-11 14:16:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 17afe1d3dcb1e4d6f663997f42a7223f SHA-1: 3c2c00a1c0dbbfc82380c1396069b4d4f64d8705 SHA-256: a385e633e1ec6eacdbc95a8d46f4681d625d3c16f53c75caa61b7d4fd650b286
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?keyword=jen+wilkins+women+of+the+word+pdf In PDF document text
    • https://dekekutema.weebly.com/uploads/1/3/4/4/134440935/51c4c88b3aa083a.pdfIn PDF document text
    • https://dejaxunex.weebly.com/uploads/1/3/4/3/134318563/8168036.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/7871146.pdfIn PDF document text
    • https://fevokokedu.weebly.com/uploads/1/3/4/5/134500062/sufuzixak_nelisebivaw_wokabisuvu_lowepi.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/zolurovezokulasu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e764306e-429f-4ec8-9384-a1487c465115/84786862608.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/chemistry_formulas_free_download_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf62e7fc-0749-4166-b0ab-0ec15d18c431/condor_heroes_soundtrack_1983.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/worksheets_for_the_boy_in_the_striped_pajamas.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/leni_riefenstahl_nuba.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/desktop_computer_deals_ebay.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_off0000e29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 5216 bytes
SHA-256: 3eb08a86343fe543c55e8afcb1f9f0f54b812ad61373f07c04136545da2c3b47
font_01_sfnt_off0000f442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF442 10144 bytes
SHA-256: 27dd6bc5a6674a50f21e4eb96d4a33f1306fdcd738ae5a9037f149eb94e64527