Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17c866cf377311c…

MALICIOUS

PDF

67.3 KB Created: 2020-11-11 18:24:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 111de5db8ec88d3bb92e025ad07e6c65 SHA-1: d2eda540c1bcd2edd631f03d4d81fe270bf61080 SHA-256: f17c866cf377311c4f84e77bf5ec57e6bc759b55f393a009648afb7f31b4f316
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL points to a suspicious domain, likely used for phishing or to serve a second-stage payload. The document body, though heavily obfuscated, contains keywords related to 'guidelines' and application metadata, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://traffking.ru/aws?utm_term=juvenile+rheumatoid+arthritis+guidelines
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f96f84853429.pdf
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8a4c8372a53.pdf
    • https://cdn-cms.f-static.net/uploads/4456699/normal_5fa2f3027b71b.pdf
    • https://cdn-cms.f-static.net/uploads/4369173/normal_5f969bdc03829.pdf
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f96c392e0d0a.pdf
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f9164e16c25e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vidadaviwal/game_of_thrones_characters_1.pdf
    • https://s3.amazonaws.com/divelatoxa/42149347093.pdf
    • https://uploads.strikinglycdn.com/files/3fd77c73-cdb7-4629-893c-a57b32961270/60783603666.pdf
    • https://uploads.strikinglycdn.com/files/973d7656-03a1-4b56-9328-76c576f7dee4/zeberujukedutizapeve.pdf
    • https://uploads.strikinglycdn.com/files/351041d1-388a-4713-8608-7b2b1a0d17de/47634344274.pdf
    • https://s3.amazonaws.com/mulerux/wiralebitaripobebuwebola.pdf
    • https://s3.amazonaws.com/ruzumeb/free_gems_dragonvale.pdf
    • https://s3.amazonaws.com/kavitokolezub/atualidades_2018_download.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_off0000c9f3.bin
222249ce17c20c35e26045e90cc3c0ab20b27b1341c2816f9ad03a566b46966f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F3 5288 bytes
font_01_sfnt_off0000dbc6.bin
6c87cebb6ac09d71565b84fed0c4dd240eaacdbc3e0ca815027a4acfb1783122		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 10776 bytes

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