Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0ea132bf57dbe91…

MALICIOUS

PDF

71.1 KB Created: 2020-12-03 16:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 81aaf6014480e31ba74f4e0acf574e79 SHA-1: ec03acbd2d0a95d4b747fa8245fac2c30c619b2c SHA-256: c0ea132bf57dbe9144a9cb65cd30018692a81099db0513b26e4d60dd038bf8ab
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://trafficel.ru/aws?utm_term=berthold+baskerville+bold+font+free', is presented in a context that suggests a deceptive lure. Another URL, 'https://s3.amazonaws.com/fakuguvil/axis_camera_station_3._55.pdf', is also flagged as a potential entry point for malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafficel.ru/aws?utm_term=berthold+baskerville+bold+font+free PDF link annotation
    • https://femevidawivuk.weebly.com/uploads/1/3/1/0/131071063/tobijed.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/kekiwozok_nolorujo_fuvokatojaf.pdfIn PDF document text
    • https://solusolifodijal.weebly.com/uploads/1/3/4/4/134433047/fedofubagasevede.pdfIn PDF document text
    • https://pedutiwoda.weebly.com/uploads/1/3/4/4/134481784/mujofaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413573/normal_5faec846e6c7d.pdfIn PDF document text
    • https://giboramogu.weebly.com/uploads/1/3/4/6/134627050/2111216.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fakuguvil/axis_camera_station_3._55.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd745bcb0228a2824d01/t/5fc19a65e6d49a06bbcf50d1/1606523494222/road_to_singapore_citizenship.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5599388c99b6d37c4f1c5/t/5fc89f11217b3604ede0fc1f/1606983444876/82051554645.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07d836b97992eb55a0df7/t/5fc205015147b1480479cd69/1606550785172/spotify_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/bavedokupoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13b47c14dfd36fef3b64a/t/5fc61917f81c9a2a0c741ecb/1606818072385/vitoxitiwiz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54804c89e1c4b8fdb8c21/t/5fc8667ee101942bf76fd354/1606968958854/19428176845.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5da53485235c86bde238/1606376871383/information_technology_reviewer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc002d40b6b03258f30bf3d/t/5fc15219173fb5383bd38e51/1606504986326/zelemip.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_off0000b463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB463 5096 bytes
SHA-256: 7682642c77f16ec1db8463ab8a147a8958683560579857fb2557bb9b71b54b43
font_01_sfnt_off0000c5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AC 21204 bytes
SHA-256: 4a75b52f0529193d792cb823c564adea103d083e0538142e7a7dff5ac611daab
font_02_sfnt_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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