Malicious PDF — malware analysis report

Static analysis result for SHA-256 0718a18b76215e3c…

MALICIOUS

PDF

72.1 KB Created: 2020-11-20 02:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bf0f77126d5a4563cc5ba14458a8c155 SHA-1: 8e01685a9a2d47a6401c2ba17ffbc15f6ca1c947 SHA-256: 0718a18b76215e3c3a5779ddd0ca1d33434475e35d032e29f931b048ef11e8a1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffnew.ru', which is likely used for phishing or to download a secondary payload. The heuristic 'PDF_SEO_LINK_FARM' suggests the PDF is part of a larger scheme to generate traffic or distribute malicious content.

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://traffnew.ru/aws?utm_term=adobe+after+effects+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371514/normal_5f9187a920762.pdfIn PDF document text
    • https://sefufomoxuve.weebly.com/uploads/1/3/4/5/134528328/botasafimiga-zogasosasira-fekedijuv-bidapilozeso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9a539a-83f0-4935-8d1f-f65599f76f6f/rimigunimod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82eb5425-2d18-4f8d-a4ef-1ddb66c19719/86175760735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88115b6b-6e0e-4769-8559-5e37c323a831/madden_19_cfm_scouting_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61d92b3d-853e-4dc3-88d5-93936c70b800/63287744534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b167e4f4-7ae1-46c9-a670-c07d790aeac0/correccion_de_desviaciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f96462d-4f52-4bd7-b195-740c35912aac/play_pokemon_nuzlocke_randomizer_onl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d23a24-0fb6-49aa-b67a-9440fc9a2747/sobekaxasalenamegew.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/google_android_studio_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7e6e416-2a6f-4ee5-9296-a55d193aebd1/2009_ap_chemistry_free_response.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/the_magic_school_bus_gets_eaten_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/387beb63-5b5b-402d-a3a2-c877c5c2ab1e/we_are_okay_nina_lacour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddfee868-532a-4eb0-afa2-898166ff69b4/dosixifomafadagaluxajes.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_off0000dcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAB 5420 bytes
SHA-256: d4ed1368d02f8d7e07b9f92dafa3d2fb018b59035bd5d5296e141f1f8aaf966e
font_01_sfnt_off0000ef2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 10624 bytes
SHA-256: 41da13f7491f9aed8b84d056997c628609bf64df78b93a6eb587f351dc7e0c96

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