Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4819502fde7125…

MALICIOUS

PDF

71.5 KB Created: 2020-12-03 16:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8048bfd7ef804fa073a1269dc2cf9c32 SHA-1: da1f9218fe0f9ae4fa47fc9296c9c34c65b15f59 SHA-256: 0d4819502fde712592dfebe4044d3b60186408b3bd668537b52255f7e98440f5
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://trafficel.ru/aws?utm_term=luxaflex+powerview+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500453/normal_5fb70902e550e.pdfIn PDF document text
    • https://jutisopi.weebly.com/uploads/1/3/4/7/134775863/556b8a41f2a534.pdfIn PDF document text
    • https://rojusonevupa.weebly.com/uploads/1/3/0/8/130814232/5871397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_5fa9113fa06f6.pdfIn PDF document text
    • https://lijixavin.weebly.com/uploads/1/3/4/5/134598275/8d45d3f98945d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.fontrix.comhttp://www.nhncorp.comIn PDF document text
    • https://uploads.strikinglycdn.com/files/5064828d-fd08-454f-a145-d12efc764059/23169401862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/684b1445-0ab4-4282-bf4b-99d563eeddc7/gowujafopef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45a514a-ca93-4485-b903-5e4aa9ff9a4d/72522773286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d611c1-e751-4986-87be-25b406e71942/24389319254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e874ef80-cb98-4004-aafa-d3cb90f05d88/netamixewexixixijomob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea47b82a-91ef-45b5-86a5-ee89763b3150/scag_mower_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7bb36f-6c34-4570-b969-a3ca7ab33926/at_te_walker_toy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95a3959-a913-4a58-a81a-fc10c480d748/binomische_formeln_bungsblatt_mit_l.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_off0000d1c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C6 5192 bytes
SHA-256: 5c553d381a774acdeeee2c30b3e026f45005c8c7de3644f48dac3cd7ee5518a8
font_01_sfnt_off0000e3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AA 10348 bytes
SHA-256: f795f6734f31fe629151c33c7143315fbc4c39ac1b81794b9b6dfc0268ffdfed
font_02_sfnt_off000106ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EE 2072 bytes
SHA-256: 9694f1dd22230d2bd019691d6045c1608fe576088d4789ec8d7661b4e8256c88

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