Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6bb9bbd1697c45…

MALICIOUS

PDF

63.1 KB Created: 2020-11-18 18:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bd763ff4d38146b5afdb285dc390b557 SHA-1: b41be5039319ed2a74d68f70b81d713035f21224 SHA-256: aa6bb9bbd1697c451a1f3a205882199b7020bd410fcaba73d35719ec63c47c59
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm designed to direct users to other PDFs. One of the primary external URLs, 'https://traffnew.ru/123?utm_term=uber+india+add+a+stop', is flagged as unknown reputation, suggesting a malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware delivery.

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://traffnew.ru/123?utm_term=uber+india+add+a+stop PDF link annotation
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/5d6eb7.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/e90d6eaf70.pdfIn PDF document text
    • https://gikudinok.weebly.com/uploads/1/3/4/7/134730402/gigowaxuk.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/likadojivivofu/kobarigetefijelegum.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/pivafupoporibatugobaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a278fcb-7944-4825-b557-f62f6644dd2d/what_is_an_undefined_slope_0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5dbb493-1925-4f49-bd0e-c52c22014233/kneller_s_happy_campers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a087ff-b12a-4e8b-82d9-2b949e4085ef/wellness_recovery_action_plan_worksh.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/agmark_full_form_in_food.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/smart_antenna_for_mobile_communication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fae1ce4-924e-471f-a353-d084b7aa2d32/19594052866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a770ffe-f465-48fc-93d8-41712152d5d9/vavekafofubab.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/wazixijofata.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_off0000bbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBBB 5052 bytes
SHA-256: 3bc48e184d43b93680f464d482cd88444cdae81b339f7b0c0e361736106cf6b5
font_01_sfnt_off0000ccf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF0 10468 bytes
SHA-256: 45d5884c9c2adcdce339dec28fd3e9e84503b1248a3a27b0cfb16eafdc3cac81

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