Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2cfe9361df7ec0…

MALICIOUS

PDF

89.7 KB Created: 2020-12-27 04:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7cc6412dd5c766885a80d66de67a7d4d SHA-1: d0afffd516b59e97d9d40519c9d7ec9ddb062ec7 SHA-256: 6f2cfe9361df7ec044f8c6111773f21d1f21ddab097f88a7a2b5f96f36125d42
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 designed to distribute malicious content or phish users. The embedded URLs, such as 'https://traffnew.ru/aws?utm_term=assistant+property+manager+resume+pdf', are likely used to redirect users to malicious sites. No scripts were extracted, but the overall structure and link farm heuristic point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=assistant+property+manager+resume+pdf PDF link annotation
    • https://cdn.sqhk.co/zupodejadofe/cgijeii/ouroboros_fma_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/sufadoma/MsQjaWY/slide_away_meaning_genius.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/porotevu.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/fikuvine/antique_acrylic_mirror_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1426ce-1a9c-4890-aa51-850b40111d8b/ensayo_de_comparacion_y_contraste.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/pokemon_beauty_and_the_beach_screencaps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1239a526-f28a-4169-9578-a9a6e9d719c4/in_the_meantime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0feffe5b-333c-4844-a888-be456be37dd8/dijofuto.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/46767109889.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/lagu_i_love_you_3000_wapka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07fb9ae-13f0-465a-a993-4365f32d722f/16304603594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a438ac81-75b6-47c1-930d-446f31e7c3de/norman_public_schools_calendar_2017-18.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_off00011459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11459 3396 bytes
SHA-256: 019ae317c1ae45cf80e7afb453b05714fcc380a874e5f543d71113ea1553695c
font_01_sfnt_off00012080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 5420 bytes
SHA-256: 37d89c307c6fa0bd839c9328558a526a1c22bf5a838d85fbfeee6de11429f486
font_02_sfnt_off000132eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EB 11276 bytes
SHA-256: 88796ff47e21b6f90cb694a55b980eea5f74aa4664c24afa481a3048a6f7ba89

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