Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13a159297f0ed7f…

MALICIOUS

PDF

64.7 KB Created: 2021-02-19 19:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: e95f33eddea394d9694db58b14c9b424 SHA-1: 96b6021ab3fd4d7003d7591fde7096f37af8f7c6 SHA-256: c13a159297f0ed7f73dc5beed02d7dfe07b3621b266e2717098fe0bbbb48cab4
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains an embedded URL that redirects to a suspicious domain, likely intended to host a malicious payload or phishing page. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to trick the user into visiting a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/strik?utm_term=lexile+score+chart+by+grade PDF link annotation
    • http://the-glow.ru/totetoripunavezapenovef5fqf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446045/normal_6002a23ce11a4.pdfIn PDF document text
    • http://gayerkan.com/3864625096i9lo8.pdfIn PDF document text
    • https://nimekeboxiz.weebly.com/uploads/1/3/0/8/130873861/guzikomixe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447280/normal_5ff3e51482562.pdfIn PDF document text
    • http://ita-talia.fun/neverending_story_cast_names9a6lm.pdfIn PDF document text
    • http://manybigs.space/dictamen_pericial_psicologico_ejempl13j80.pdfIn PDF document text
    • http://50offshop.pro/lefokorakigovanobinohkdn4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366312/normal_5ff85178d15d5.pdfIn PDF document text
    • https://xoravali.weebly.com/uploads/1/3/0/7/130775395/7195182.pdfIn PDF document text
    • https://zaxixeresez.weebly.com/uploads/1/3/1/8/131871416/e426f6b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451019/normal_5ff3fcf3bfb52.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/wulobagezama_wojoxed_duxenuriju_jabit.pdfIn PDF document text
    • http://servisvds.ru/neo_geo_battle_coliseum_rom_atomiswave6m3pk.pdfIn PDF document text
    • http://adanakebap.org/four_month_calendar_template_2018zwg47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liwafo/werbungen_blockieren_android.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/ielts_writing_task_1_sample_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/honeywell_air_purifier_manual_tower.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/joronawizugobimizupus.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1A9 5452 bytes
SHA-256: 5f9f32eb70eec4a503483979eeda120190a69536b8786722f1f8b2dcccc79a80
font_01_sfnt_off0000d439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD439 9704 bytes
SHA-256: 12c49319e498dd73b0975a75b27e7108b5d7474feb66c363addc90cc24b7fa90

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