Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a25643111d46cf1…

MALICIOUS

PDF

70.6 KB Created: 2020-12-19 07:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7321bcc462085a64f5e4729ba19094a SHA-1: d5e1db1240a2a7a26a911e2706b627fe68672437 SHA-256: 8a25643111d46cf16c95032e7c8baa5cef077254d1918dcc3ee89ab27f4b29c3
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 malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=proceso+de+manufactura
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fa8230120eb1.pdf
    • https://varusimutajol.weebly.com/uploads/1/3/4/5/134502614/kilodekuvubufixap.pdf
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/9042433.pdf
    • https://static.s123-cdn-static.com/uploads/4369138/normal_5fce3489868aa.pdf
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f9d418406046.pdf
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5fb88c34d3f14.pdf
    • https://cdn-cms.f-static.net/uploads/4481828/normal_5fd9c7bebf08a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d81a95df-df27-403f-95b4-57a180021540/84098927662.pdf
    • https://s3.amazonaws.com/henghuili-files2/60918979790.pdf
    • https://uploads.strikinglycdn.com/files/2e82cf2e-a314-4988-9b62-3c45a4f7106f/60701040428.pdf
    • https://s3.amazonaws.com/gotijejaj/xemibituwepamo.pdf
    • https://static1.squarespace.com/static/5fc6eda9a4d75e5252f1a6be/t/5fc82846e101942bf765d79a/1606953036662/fire_and_water_4312.pdf
    • https://s3.amazonaws.com/napoledunadigo/komanabazeb.pdf
    • https://s3.amazonaws.com/vekodupiwarobi/nilubabevumusirigiwot.pdf
    • https://s3.amazonaws.com/nisiwanolom/magazine_layout_word_template.pdf
    • https://s3.amazonaws.com/gadumagabusodel/posamexofesunamidefako.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8d6.bin
4e8f7b24aea1e70a0f32f345be583ffa258146f4a399f14c76a771cf707d6221
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D6 4968 bytes
font_01_sfnt_off0000d98d.bin
6df1d951d21442f844cf60ed207dfcf1f65ac8a45a243bb423d28d98650ee01c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD98D 11156 bytes
font_02_sfnt_off0000fdeb.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDEB 4324 bytes