Malicious PDF — malware analysis report

Static analysis result for SHA-256 b14d16bd79da097b…

MALICIOUS

PDF

101.8 KB Created: 2021-01-23 06:20:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 31b44c8918a8d49fe01cd7a6bdce8c77 SHA-1: 2f1e890cd9c616a1e7263f436d4f7a59e91ce024 SHA-256: b14d16bd79da097b3562e41efedbe643b7d4134ed735db693f4aa4554062ae29
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded external URI pointing to a suspicious domain, which is likely used to host a malicious payload or redirect to a phishing site. The document body is heavily obfuscated, but the presence of embedded URLs and the overall detection suggest a phishing or malware distribution attempt.

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://druttle.ru/aws?utm_term=superman+logo+wallpaper+hd+android PDF link annotation
    • https://cdn.sqhk.co/vumorumuvogi/B8iLwie/50377272468.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/hdjdGXH/51023103330.pdfIn PDF document text
    • https://site-1168494.mozfiles.com/files/1168494/zawekabowugufokewefotere.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/jgVRyic/recarga_unefon_mexico.pdfIn PDF document text
    • https://site-1179273.mozfiles.com/files/1179273/bird_wing_flap_speed.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/JkihjcK/93102621458.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/bMGqZja/64206553382.pdfIn PDF document text
    • https://site-1168144.mozfiles.com/files/1168144/real_car_driving_experience_racing_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/I9f7gi6/68126898511.pdfIn PDF document text
    • https://site-1229287.mozfiles.com/files/1229287/99259733729.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/midizaxopazeji/23645733017.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/jobej.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/android_x86_vmware_display_resolution.pdfIn PDF document text
    • http://nasedelowose.rf.gd/28127502681.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/kikoduwonigakip.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_off000141d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141D4 5192 bytes
SHA-256: 815769d4fb4e1bd8b87aa8ebd94ca105fb0591f55750855ba492a7c9950f0047
font_01_sfnt_off00015344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15344 11860 bytes
SHA-256: 40122bef1e80bf8fac4bfea9247aa09d4217362d767ad89db7e1f56821fa6f32
font_02_sfnt_off00017bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BB0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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