Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aed112ff6691abe…

MALICIOUS

PDF

72.5 KB Created: 2020-11-25 13:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ce6fba112209663d0172c62edc29e2c3 SHA-1: d3f49cd2038f15691ec01ae05b62815da5339b86 SHA-256: 9aed112ff6691abe9c9cf11c23c9def14666199a1b4b5fb151e8f0abc46903e1
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 0.9997

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://traffnew.ru/strik?utm_term=sea+ox+boats+history PDF link annotation
    • https://kadikodol.weebly.com/uploads/1/3/4/7/134747526/5244617.pdfIn PDF document text
    • https://rupunapu.weebly.com/uploads/1/3/4/3/134354814/c3a4a0f67b8285.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/wajilaxexanowugu.pdfIn PDF document text
    • https://dexoxewivovevub.weebly.com/uploads/1/3/4/3/134322619/3576049.pdfIn PDF document text
    • https://vamabeloketofip.weebly.com/uploads/1/3/4/3/134344852/1570706.pdfIn PDF document text
    • https://ruvetuse.weebly.com/uploads/1/3/4/6/134618438/bezuvasomokemew_mejaxawoj_debideropubag_nunagu.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/jagux/shrimp_boats_for_sale_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f95089-24a7-432c-9a32-a94bbafc1e96/nirugure.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/ximonepexoxapudusakup.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/rainbow_flowers_paper_craft.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/partners_in_performance_salary_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/86532600093.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/what_is_manifest_content_of_a_dream.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f741a6e7-c324-4b02-8ae5-1297f297e761/wirakepadixisubikipetaza.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/inventory_report_sample_letter.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_off0000de3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3D 5152 bytes
SHA-256: 3ab753618852abd1fd5efb76a5b3fae1b4a4b152497e49b4b8596a75fc1a31b6
font_01_sfnt_off0000efc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC3 10996 bytes
SHA-256: 303f35c62b3e494e8c506a0514e8045d880ec1686b7442cddc27bdb358eaa12e

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