Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9ddd3abc84bf77…

MALICIOUS

PDF

76.2 KB Created: 2020-12-03 09:47:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f4cca27fbbf115ed4d01a9cb27963314 SHA-1: deb70365dbfa8d6deb2421affeeb0f14995d35a7 SHA-256: 9b9ddd3abc84bf77728c808835ceb8805edf372a8c515dcbb5792b33cc5630a9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/strik?utm_term=data+communication+and+networking+pdf PDF link annotation
    • https://lutilaxo.weebly.com/uploads/1/3/4/5/134599665/pologugope.pdfIn PDF document text
    • https://fategebedabeno.weebly.com/uploads/1/3/4/7/134718848/085e8efba9fb565.pdfIn PDF document text
    • https://lisunudutiz.weebly.com/uploads/1/3/4/5/134530231/8738479.pdfIn PDF document text
    • https://talogaxuzule.weebly.com/uploads/1/3/4/5/134596774/6902067.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/suvedefekagilap-rapulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f878ddb8ba8e.pdfIn PDF document text
    • https://tijogarukaro.weebly.com/uploads/1/3/4/7/134710746/zajitidinokav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476142/normal_5fb8432d0464e.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/vapite/brady_wire_label_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf5eeea-e2f6-4fb8-b1ad-f16d3f020387/vepelarufoxoxava.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36057abaecd3318320830/t/5fc7bad35fecd2174b6a83b9/1606925012877/40638251859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7907c72b-3939-4f91-a893-beb19ee8d6e2/78663176611.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a911403f5353fdbdb28a/t/5fc883c6dcb5b260797e23a7/1606976455496/firebi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc525840b6b03258f50f531/t/5fc8476592e74531f3c58bdd/1606960998370/lovebo.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/61710745290.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffea5239b0722912c2f3a/t/5fc149d83c6ccf69f38d8926/1606502873262/which_of_the_following_would_be_classified_as_a_financing_activity_on_the_statement_of_cash_flows.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_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 5420 bytes
SHA-256: 34e542a9b41eb585a9694853482fdecf423f8262dc4506ea671add06a909f277
font_01_sfnt_off0000fd35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD35 11320 bytes
SHA-256: d3ec46b63a930b4be4389fe7097883e005ea67d808295c56e79c6bfdecab8fb5

Open this report in the interactive analyzer, or submit your own file for analysis.