Malicious PDF — malware analysis report

Static analysis result for SHA-256 9164fd4e72609440…

MALICIOUS

PDF

71.9 KB Created: 2021-03-01 01:01:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5d14ddbbe08c85cc7f2e34d2ae69952c SHA-1: df3c0426965c19bbe9a97c7215e993bafd1e7d49 SHA-256: 9164fd4e726094401966a808b0d0d7f7138a2f3ad92a6d54698d0c187e8feae6
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/wix?keyword=galaxy+grand+prime+cricket+unlock In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5fd27b95d1593.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5fc666a268971.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/6fa2131e1ab9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531626/normal_6002ffa415b2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443356/normal_5ff982a045e24.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/jeLAiem/stickers_memes_dominicanos_wastickerapps_emojis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_6022a6d2a9973.pdfIn PDF document text
    • https://cdn.sqhk.co/lotidonita/jAB2mxw/brothers_in_arms_3_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vukixukafoga/0jhhjcH/gumok.pdfIn PDF document text
    • https://nopuxexej.weebly.com/uploads/1/3/4/4/134498230/gefuwesakijor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454438/normal_603c1c1e1f314.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 5480 bytes
SHA-256: 31f2ae83791a11149d7b227a71388853ba3d288f7954fefd78638f76b25507e9
font_01_sfnt_off0000edc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC0 10948 bytes
SHA-256: b4bb0b9cb531a4e95bad508ce1a5c3e82e7215a8ed160ede3a2ec0c2b0ab436b