Malicious PDF — malware analysis report

Static analysis result for SHA-256 026672cf3f42b40e…

MALICIOUS

PDF

67.2 KB Created: 2021-04-20 18:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ad00f4007528f6413267f1b217ee3ac SHA-1: 49730871fcff0e9c0c3ab20cea4b0c1b19058527 SHA-256: 026672cf3f42b40e91c29468bfa80a43f56734c14fab39e539a1b3a41091cd55
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 a suspicious domain, likely intended to host a phishing page or download a secondary payload. The document body is heavily obfuscated, but the presence of external URLs suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://nipisod.ru/strik?utm_term=vb.net+code+book+pdf
    • http://jikusofare.mywebcommunity.org/how_to_learn_english_words_spelling.pdf
    • https://static.s123-cdn-static.com/uploads/4380084/normal_5ffcb9c31a3b4.pdf
    • https://cdn-cms.f-static.net/uploads/4387924/normal_60501a74bc7e1.pdf
    • http://dexiserabasavo.mygamesonline.org/wadabale.pdf
    • http://medazuxa.mywebcommunity.org/51298790843.pdf
    • https://cdn-cms.f-static.net/uploads/4375361/normal_606c90249e324.pdf
    • https://static.s123-cdn-static.com/uploads/4444358/normal_5fe549936e66c.pdf
    • https://static.s123-cdn-static.com/uploads/4390637/normal_6009ac26a1b15.pdf
    • http://jopagozopive.medianewsonline.com/63473606527.pdf
    • https://cdn-cms.f-static.net/uploads/4456140/normal_601aaf08dee18.pdf
    • https://static.s123-cdn-static.com/uploads/4375073/normal_5fe3e3c3ad0a6.pdf
    • http://katipef.medianewsonline.com/fedex_tracking_number_example_on_label.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8e0b8420-70c2-407a-a7b1-591ec9507213/lemefisadotugir.pdf
    • https://s3.amazonaws.com/vuzufexarevima/faguzepuguxafiluxakimorud.pdf
    • http://pawepeg.atwebpages.com/morfologi_azolla_pinnata.pdf
    • http://fowimifefezujo.myartsonline.com/chuyn_sang_jpg.pdf
    • http://kugukokoner.myartsonline.com/48823367613.pdf
    • http://lavapokapajemob.myartsonline.com/mifibubowo.pdf
    • https://uploads.strikinglycdn.com/files/7eb8f5be-360b-4924-96db-70e6eddb3535/32226748311.pdf
    • https://s3.amazonaws.com/kubafezin/turnigy_accucel_6_50w_firmware.pdf
    • https://uploads.strikinglycdn.com/files/070f33e7-4532-4cdd-9fad-2c9d61b594ae/95070265220.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccd9.bin
e0086eb32c920320ad305ab5f5e08176057257ca44238ed3fee67ad79ab01a29
pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD9 4832 bytes
font_01_sfnt_off0000dd6b.bin
6740e6542b8ec881893f3fef493a6fa8d9094023ce4edfa94d2c0dcc71b60174
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 9984 bytes