Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07f55f1889aad9d…

MALICIOUS

PDF

76.3 KB Created: 2021-03-24 02:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3723f4dc4719454183a8338e5392cb38 SHA-1: cfa756ed5ae03453c22ba935362a1151e23af1f1 SHA-256: f07f55f1889aad9df30c69b94be57d69f4d860ea780e2145aaf9369fae791c45
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary external URI points to a URL that appears to be related to SEO content, potentially a lure for users searching for financial topics. No scripts were extracted, but the presence of numerous external links indicates a high likelihood of redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/award?keyword=time+value+of+money+pdf+ca+foundation
    • https://cdn-cms.f-static.net/uploads/4496810/normal_60355bada4098.pdf
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/b175da9.pdf
    • https://narapafugoziror.weebly.com/uploads/1/3/0/7/130775848/narujav.pdf
    • https://lezogifivejuz.weebly.com/uploads/1/3/2/6/132682585/8619876.pdf
    • https://static.s123-cdn-static.com/uploads/4404740/normal_5ff3d52daa151.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4fd59081-e9fc-45db-85c4-17d744021b1d/xejiwipejiz.pdf
    • https://0ac950e2-707a-4e47-8bf4-daface0ea9db.filesusr.com/ugd/356f11_ffca044ca58946cf943cb38c1f442673.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9cdfb09d-952a-441f-aaaa-5a7cd1870cb1/68353847706.pdf
    • https://uploads.strikinglycdn.com/files/f14ffbb8-ce78-473e-b301-547d1634060c/vegetable_harvest_times.pdf
    • https://s3.amazonaws.com/ronatiduzoxij/97931414401.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/45805388274.pdf
    • https://uploads.strikinglycdn.com/files/4f65d294-7b87-41d4-8156-61f368c4cd3d/20393668257.pdf
    • https://uploads.strikinglycdn.com/files/6d55aae7-6b5a-4d10-b8a7-9a7686a163d5/the_cask_of_amontillado_analysis_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/8678df20-fb86-404b-8394-4b5c236e5cd8/69208855105.pdf
    • https://uploads.strikinglycdn.com/files/8d80033b-ceef-4af3-a151-f0918204517b/tecumseh_hm80_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/3a7950d6-ada1-4bd8-af60-53c635d65338/immanuel_kant_categorical_imperative_meaning.pdf
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_a0d059f51dce4ec58057cdf382c3fb7f.pdf?index=true
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_6fde8d305584440dbfefc02bb904e1a4.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e514.bin
a86ebef289d68684d30b003be8ff61dd2d98015f92df14237fcc16afd0a5de9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 5020 bytes
font_01_sfnt_off0000f621.bin
1942b1c630d64bf1a36f7c497adc2baceb075eb009a6e2f6d1800e6dfd0807ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF621 11332 bytes
font_02_sfnt_off00011c2e.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2E 4324 bytes

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