Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65dd457f301da83…

MALICIOUS

PDF

72.8 KB Created: 2020-12-16 01:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 062a439afaa6f7ee41fc01943f6e2b6a SHA-1: 940ed37dc3412f0ff58a1551687f5de09a5c9a55 SHA-256: c65dd457f301da8337a5ea6d0d72a6d064c92a188d0e68654c71caba1d2c87da
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, indicated by the PDF_SEO_LINK_FARM heuristic, suggesting it is part of a link farm or phishing campaign. One of the embedded URIs, 'https://trafficel.ru/123?utm_term=reporting+live+from+the+gutter', is a primary indicator of malicious intent. The ML classifier and ClamAV detection strongly support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=reporting+live+from+the+gutter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450747/normal_5fbc22bd2a14a.pdfIn PDF document text
    • https://robitejipesiz.weebly.com/uploads/1/3/4/3/134375849/d08f21718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5fbfd6e7aabcb.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/18b2032f-0bb2-4896-a561-373e9ba20241/chapter_5_geometry_test_form_g.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/71290113932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55df063-9868-4f10-90f9-59c23f8eed0b/zofadusivujixela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48305379-652a-4e0c-878e-978fdac5cdec/cerca_de_ti_jesus_adrian_romero_karaoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79df2a73-5f2d-49ad-8964-52ba1926042d/san_diego_food_handlers_card_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/passive_and_active_form_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db8e2af7-5584-4751-bc4a-25c985ab89df/lozakikulekavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6520971-9a2d-4940-a033-a5e2239fd83f/65435516764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9adf95d-d82c-4b25-af01-d2a48ebd81d5/planet_coaster_cracked_mods.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/458027a7-ec33-446e-9bb8-de2bc6a89949/41326261116.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5313f6da-d316-49d9-95ba-6af90d71e82f/kozuxepupoluzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f389eed6-dfb2-4e7e-8da0-5b9ecdd952af/36549340616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64294a5e-e0fb-4a6b-8ed1-8f53ee145d9d/edward_bernays_crystallizing_public_opinion.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_off0000d5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A6 4876 bytes
SHA-256: f0e436a2845b92c3d5b6f50e6b9696c7dee760f5f6f237f48ca857b9b5ed5495
font_01_sfnt_off0000e61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 9996 bytes
SHA-256: 42f4ae77f698faf0bb214b48d00bdf5ce58abee38244b4de398d3e083f9a5a5d
font_02_sfnt_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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