Malicious PDF — malware analysis report

Static analysis result for SHA-256 27609926ffa3a642…

MALICIOUS

PDF

72.8 KB Created: 2020-12-01 11:57:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecd691585c52c04aec755a6bb792c782 SHA-1: 777662002ce14f0de650f0170c2ed5e5ab4f786e SHA-256: 27609926ffa3a6426862eb5b7733cdbbaa4ccb413256ff70a096a46437da1296
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/aws?utm_term=number+bonds+worksheets+free
    • https://cdn-cms.f-static.net/uploads/4459629/normal_5fb2d2df0916c.pdf
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f873cdbda008.pdf
    • https://cdn-cms.f-static.net/uploads/4365606/normal_5f8df9ecb89b5.pdf
    • https://cdn-cms.f-static.net/uploads/4384480/normal_5fb33b24cbcfd.pdf
    • https://cdn-cms.f-static.net/uploads/4385633/normal_5f98aecc32e67.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/127c603d-6e89-4558-a1f6-ee0b9509e347/buzipedumob.pdf
    • https://uploads.strikinglycdn.com/files/93aebc3c-52d3-436e-a03a-8b64c6d8055f/31402070882.pdf
    • https://uploads.strikinglycdn.com/files/d175abe3-f598-40d6-a95e-f0fc8fa7d224/xonawetagixagepukarob.pdf
    • https://s3.amazonaws.com/juvosi/ontario_cervical_screening_practice_guidelines.pdf
    • https://s3.amazonaws.com/tetazino/anna_karenina_bangla_download.pdf
    • https://static1.squarespace.com/static/5fbfd016c30a162e0c4c3cab/t/5fc607f7fa04221c71eeec23/1606813687616/2974789516.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/movies_free_online_mp4.pdf
    • https://uploads.strikinglycdn.com/files/f2fcb548-ce87-4840-a5f2-4959e0114e9c/kanne_kalaimane_sad_song_download.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf0369b1ed035389f7288/1606283318887/plantronics_voyager_pro_hd_wireless_bluetooth_headset_manual.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_off0000d3bc.bin
dc98823ed1b56349e1bdfe77dd8d3941248fd05318fa3f7ef6299bb08e0bd9fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BC 5004 bytes
font_01_sfnt_off0000e49e.bin
ee3833581cc58b170cfb4f70e91498f59d517e533df0f7f920c7bbd486f694cb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE49E 10484 bytes
font_02_sfnt_off0001083a.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x1083A 4324 bytes