Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a4290180261955…

MALICIOUS

PDF

69.5 KB Created: 2020-11-25 02:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0d4b3ce8af1cc95aa098d0ac6ca3b477 SHA-1: e0acd81b7b4dbac36fb4bc74df32ead54169a4e8 SHA-256: e2a42901802619555dc54965fe832700281fd6406c3064673e9a6dce2ce5fcd6
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/strik?utm_term=lakeland+auto+mall+parts'. Additionally, it features a PDF link farm with numerous external links, including one to 'https://s3.amazonaws.com/zomuzigo/nipawasufowupebow.pdf'. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or trojan-like behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/strik?utm_term=lakeland+auto+mall+parts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5fbd8c943a398.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5f8d54cb6c8c8.pdfIn PDF document text
    • https://gikotibosad.weebly.com/uploads/1/3/4/3/134332820/vipivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449774/normal_5fa87936bd9d2.pdfIn PDF document text
    • https://birisudim.weebly.com/uploads/1/3/4/4/134467091/sijuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5fb606a545ad0.pdfIn PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/pekebabaguwid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_5f9582fb8c506.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zomuzigo/nipawasufowupebow.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/super_amoled_wallpaper_pro_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/mavol.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/59889637435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c038079-b267-4246-95a1-a655dc79308e/safazavosopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1611174d-08be-42f2-b979-95f1558192b9/97928583330.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC843 4944 bytes
SHA-256: 9c2d37a73c1bcb6d5dadedf44368ef2732b2488c833027c5cda1efaf6feda380
font_01_sfnt_off0000d8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F7 10080 bytes
SHA-256: 000ab220411a43d211a911af5c11c88196aca31be7a939d56325750d87568477
font_02_sfnt_off0000fb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB70 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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