Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d9967246b9829c…

MALICIOUS

PDF

70.1 KB Created: 2020-11-21 19:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c296c0c4a13d46a76d5901355d8c511 SHA-1: 189cbd88026c9d2a2e29e3ed2cca21c0f2e600f8 SHA-256: 49d9967246b9829c021a1281614603a4733fd93ddcabe9cb6045aaa654c34958
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign designed to redirect users to potentially harmful websites. The embedded URL 'https://trafftec.ru/123?utm_term=discount+pools+direct+online' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/123?utm_term=discount+pools+direct+online
    • https://cdn-cms.f-static.net/uploads/4387808/normal_5f94627ee10ec.pdf
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/fivodufiroxafufug.pdf
    • https://lixabexuraluna.weebly.com/uploads/1/3/4/2/134234562/3615758.pdf
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/lokagafifoxe-newuto.pdf
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5fa80f3c6f49f.pdf
    • https://sajenaviwabawi.weebly.com/uploads/1/3/4/2/134266368/busod.pdf
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5f8eed4e4c156.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/duzexefemosaxe/schedule_il-e_eic_tax_form.pdf
    • https://uploads.strikinglycdn.com/files/ca0bb269-0072-4b23-9d1a-b122f303d45e/92809573694.pdf
    • https://uploads.strikinglycdn.com/files/3b92c7c5-fd38-4380-9e35-eb6dcdf2aefe/xuridusupokajelezose.pdf
    • https://uploads.strikinglycdn.com/files/37871dc1-f118-47cc-b490-1c2a09b5713d/48194898354.pdf
    • https://uploads.strikinglycdn.com/files/af24e4fb-3337-4af7-8239-41fd1b7c3808/bevavipoxovijip.pdf
    • https://uploads.strikinglycdn.com/files/921f9a9d-432b-4b30-8ea7-5993a5c0e47d/sutexojajumitedepusoju.pdf
    • https://uploads.strikinglycdn.com/files/3fa1c827-3c01-41fc-bd7c-d49735c5b443/la_piedrecita_bertin_y_lalo_mp3.pdf
    • https://s3.amazonaws.com/senodiw/36027173632.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6cd.bin
f71a9c86fdc06cf065863ee18378f591f5369a711a76eb7ad882453fa7a4f135
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 4856 bytes
font_01_sfnt_off0000e765.bin
dca95c2a799e284721c1342084a7b48d81ee9385ccfedc1d71bb80f03b92c5c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 10744 bytes