Malicious PDF — malware analysis report

Static analysis result for SHA-256 43edb42cde09bfb2…

MALICIOUS

PDF

75.1 KB Created: 2020-12-07 05:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: c3e233c9c5a92e23684ee124d02e6521 SHA-1: 4d056bd4a362564f408f4879acf313c8602ec136 SHA-256: 43edb42cde09bfb296f9b7608d2073f08721dabcd14df1ee3d0a073451ec6f62
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate a link farm designed to direct users to potentially harmful content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing lure or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://traffine.ru/square?utm_term=commander+mtg+2020+rules In PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/4776036.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/nevovumowa/gerov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a7fce2fce462bcb40d5b/t/5fc86a7ef97c193540ef7f7d/1606969984662/82601190422.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/la_zingara_donizetti_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e940bd14ff0dd29cb4d3/t/5fc154939b1ed035380d6af8/1606505619906/16076992839.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2c57848ba205d187778/t/5fc0fcb9145a8629dcd42a50/1606483131102/call_me_maybe_ukulele_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/3805023437.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37448e5c7695ca9abd32f/t/5fcab377b2edc9797151e4c9/1607119736827/key_battles_of_the_us_civil_war.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/tobajalogaderifo.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_off0000e8e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E7 5324 bytes
SHA-256: 969e4440c88542be7bcfd58a5f8f0229f3eeb69b1b063d955da4b1e2c3da8584
font_01_sfnt_off0000fae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE0 10860 bytes
SHA-256: c3717a91b1f5fb77592fa85d2a7453b7c29115215a19b82a7081dbb839d0ee07

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