Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21144d22a255917…

MALICIOUS

PDF

77.5 KB Created: 2021-02-23 01:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: de8a1c46204f409b12709df8538403c6 SHA-1: d91404744f27db8b9b321e2269f530d974553c2a SHA-256: d21144d22a2559173f7df434d7fd49294aa24b9969271006c5db12ea8f84c2b3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

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://maypoin.ru/strik?utm_term=farmer+boy+laura+ingalls+wilder PDF link annotation
    • https://cdn.sqhk.co/bedepekemat/xk4jhvi/fall_dudes_3d_early_access.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468267/normal_5ffde4467050e.pdfIn PDF document text
    • http://trychambre.xyz/how_to_do_a_due_diligence_check674w1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5ff7c5e0b5ec4.pdfIn PDF document text
    • https://cdn.sqhk.co/ninafoso/ggcK9ic/joker_ringtone_lai_lai_lai_mp3_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_5ff5024bc3058.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5ff57060d4ab4.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/bbEfjif/xemudafejarokugefigokajoj.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/hhwgihi/jozoromosobuvulepazew.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/1jejiuG/gafamogezewotepo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403951/normal_5feba64e83a9a.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/czCAjc3/jitexazefupamofuxime.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/fixararololu/crafting_guide_dayz.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/94067881614.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/xidobezizuga.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/differential_calculus_in_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/busifeliwul.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_off0000f17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 5436 bytes
SHA-256: 2110ee7a771c44a3e015e60f46fddda2a4f3281d0817fb75b55b7967c7808aa7
font_01_sfnt_off000103f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 10888 bytes
SHA-256: 7b28e851f615fe6886f991b8243d3697fabef3baa1f874f9b7979962cdacc214

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