Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db26f7055dc7b9c…

MALICIOUS

PDF

64.3 KB Created: 2020-12-16 11:23:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cf8642add74169515f40e1a6266b76bd SHA-1: 36189a8e5972cd66192e16560e26e058bddd47bd SHA-256: 7db26f7055dc7b9cf984f2c39eedc2c320b1e434937499d39f91d23a517643c9
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure. The primary malicious URL identified is https://cctraff.ru/123?utm_term=tre+metri+sopra+il+cielo+streaming+2, which is likely used to redirect users to phishing or malware sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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/123?utm_term=tre+metri+sopra+il+cielo+streaming+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f95048bdb0f1.pdfIn PDF document text
    • https://numibogag.weebly.com/uploads/1/3/4/3/134323011/776bb.pdfIn PDF document text
    • https://jezitazosebizag.weebly.com/uploads/1/3/4/7/134700096/2796375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_5faf0e7e010f4.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/a833d6c7-b37a-4546-93b8-259585fc2fac/how_to_make_a_paper_seem_longer_than_it_actually_is.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/ada_guidelines_2018_hba1c_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d5116d2-6f74-48b6-8ba5-3bbe6d3baf96/56091145150.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1412bcd1e280355d6a3a9/t/5fc2c3633c02f22b9d67efe7/1606599524590/357_air_rifle.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a8e90b6b03258f40d573/t/5fc71a9b5fecd2174b57d34a/1606883996576/farm_world_kitsune.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc153656609fd0ee79445da/t/5fce4c03eb18547f4bb35943/1607355395779/chess_rules_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/94242703091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f93bfe8f-eeba-4afd-bede-b0105e2b9a0e/alaskan_ulu_knife_and_bowl_set.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c2ea58c-a16c-4a8b-a0ed-93e1de029ad9/8224184200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0dd177c-fefd-401a-ab81-134195bcb6ce/20277679760.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e82bbd14ff0dd2b64c2c/t/5fd08e821c49363a9b4d4dcf/1607503491146/nedofirabetumekudim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bcb912e-e7b3-4d59-99a3-d15f51e17128/razibegumogikizaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc578abd49dd1244753261b/t/5fc9c99485627875175b6229/1607059863761/48667165632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14b25cbf-45eb-4269-845d-52725bb18402/crochet_rug_patterns_uk.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_off0000bccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCD 5332 bytes
SHA-256: 14e1e3355d8e83d2968e691c8f4c1453eb3ed16962a359efc09d770bbc8a3a5d
font_01_sfnt_off0000ced6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED6 11424 bytes
SHA-256: 52ed135958333bb3d62b4c913d048c7ee6514f5422724afc91f1c08198c55ee7

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