Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbc00976a20c78e1…

MALICIOUS

PDF

64.5 KB Created: 2021-02-08 02:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 07fd506c915a8de27dd8af3ac6d9a8b4 SHA-1: 58e14ae3c43c7e19d1487336df638d5d6b3a553f SHA-256: dbc00976a20c78e161ac8f1fadaa726349e20d7dada74225aaa50c4a0812c274
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://crophysi.ru/123?utm_term=for+love+and+lemons+x+revolve+bustier+gown In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450141/normal_5fe2da55692ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376362/normal_601bace962a5f.pdfIn PDF document text
    • http://salonvarna.com/86319071413m1jgg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5fd60c9024671.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/737029.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474979/normal_5ff47707cb8c0.pdfIn PDF document text
    • http://sfr-webmail.com/jeffrey_archer_short_storiesuhdqh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_601c659e7c8e0.pdfIn PDF document text
    • http://future-techno.ru/aj_hack_no_surveyqhws3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379476/normal_5ffcf6a17962a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382770/normal_5ff4d679e04cd.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/daselex/70860441685.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/general_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/tivogudolanu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/60532787582.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_off0000bd65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD65 5460 bytes
SHA-256: 6c4519245294be5735998c9bb86aa1eed2898f32cdbdea7c416936da9d053ea3
font_01_sfnt_off0000cffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFA 10868 bytes
SHA-256: ce1dfa35a825e3849d8063d1b41d08bd20f4e7d5f464033d23d097c37f126a21