Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b0af63a8d74cb0…

MALICIOUS

PDF

74.7 KB Created: 2020-11-24 00:00:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d8067f55d1f8a7a95460592efd31aa81 SHA-1: d97a6b498135aedfb8ff2820e321584695dbdeea SHA-256: 30b0af63a8d74cb0bca59592ab643dd820319f502ca5c9dec40748c986bf1bc0
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK indicating a link to known malicious infrastructure. Another critical heuristic, PDF_SEO_LINK_FARM, highlights the presence of a large number of external links, suggesting an attempt to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the primary attack pattern involves redirecting users to malicious URLs.

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
  • 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=almost+a+hero+wiki In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456378/normal_5fb7f3b2cf9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5f8cb4cf9758d.pdfIn PDF document text
    • https://tajuweselu.weebly.com/uploads/1/3/4/3/134362517/lowog.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://uploads.strikinglycdn.com/files/c447e511-cb1e-45d3-b4e2-466b7b8d4725/zotujirupelumagerof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a3466f8-8e6d-457d-86aa-db5b2885ac38/befubekamoporolugemukuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d375d8-748f-40db-ac49-e45ef8bc01ef/dark_psychology_101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d978893a-4494-4b41-bee9-a00c7a8476e5/navy_enlisted_ranks_pay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f896147a-1b9e-4d53-b2ff-c9f47f7babd8/my_little_pony_game_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d17e183-1b2f-42b7-87c0-2e59c6249498/zukerogunag.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/assessment_strategies_formative_and_summative.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/nilodef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfbdf5d-3ddb-4fda-95d4-fa40fd7ed04a/philippine_consulate_las_vegas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/964719b5-f226-420e-8d77-d65208637976/90534111880.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_off0000d9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 4752 bytes
SHA-256: 006a1950d20782e6e26d99c7b17f07558032dbd1bfb15c99873360e8c10fee18
font_01_sfnt_off0000e9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F5 11012 bytes
SHA-256: c737248a1a12280aff0999c437ba3fbbbd3d7d844b811282443392dabafbf52d
font_02_sfnt_off00010fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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