Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5230f009e949ce7…

MALICIOUS

PDF

65.4 KB Created: 2020-12-22 22:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d77e28b76d9f6718a0c2de5eb886f4c SHA-1: 10bdc4b6dd0739036b41af5902c14badf4a4ba81 SHA-256: a5230f009e949ce7ff73ce854c7b20fa6188adddf06ea65d522dcbd13d61cf6b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to S3 buckets and Weebly domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity, possibly leveraging embedded JavaScript for redirection.

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://traffking.ru/strik?utm_term=lock+screen+cool+phone+backgrounds
    • https://zelekunidos.weebly.com/uploads/1/3/2/6/132682808/ximenafijek.pdf
    • https://dudezixibuwido.weebly.com/uploads/1/3/4/5/134529197/rosepowodimew_wabovik_mutot_pitex.pdf
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5fa188109998b.pdf
    • https://dusoveri.weebly.com/uploads/1/3/1/0/131070325/0b9dffe6c73.pdf
    • https://semukozev.weebly.com/uploads/1/3/4/4/134493414/rotugari.pdf
    • https://cdn-cms.f-static.net/uploads/4426960/normal_5fbbeab6e50cd.pdf
    • https://nivozigagu.weebly.com/uploads/1/3/4/4/134439663/zofajemunoset.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://s3.amazonaws.com/piwanisaj/jinirafi.pdf
    • https://s3.amazonaws.com/rogugagatuf/58282596597.pdf
    • https://s3.amazonaws.com/dojivewobasuval/87920465987.pdf
    • https://s3.amazonaws.com/xojafemori/country_roads_sheet_music_in_g.pdf
    • https://s3.amazonaws.com/tosevud/34056709567.pdf
    • https://uploads.strikinglycdn.com/files/7675c690-b80d-46d2-a55c-712fc474dab7/dodgers_score_today_8_7_2019.pdf
    • https://uploads.strikinglycdn.com/files/a9f9f8f1-4d88-4c5d-832e-16e0856cc57c/foluxukumulerowekojar.pdf
    • https://uploads.strikinglycdn.com/files/28d4f89a-7a1f-4b09-b5e3-aebaf18cac8d/77761441096.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
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af92.bin
32f00223e0bdae431cc27d37342d98944c84fed06232bc380af386445ed7bdf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF92 5480 bytes
font_01_sfnt_off0000c221.bin
38953aa9556472ccb6c7bd4c8c65116694fbcb065712425fc56f9ad297145184		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC221 7048 bytes
font_02_sfnt_off0000d4e8.bin
0aad048804d1e65b021f1b07e98202be6c810d29d1ff14f3304dfcfd7f62d622		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E8 10656 bytes

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