Malicious PDF — malware analysis report

Static analysis result for SHA-256 341a1309399f0e7d…

MALICIOUS

PDF

71.5 KB Created: 2020-12-24 03:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0421cc49130866582dcb3992279eb90e SHA-1: fda98b9bcc09d2ecda512010f6f827c44ab9cdb3 SHA-256: 341a1309399f0e7d52343fefab66c202aecbbd7a93aa1a690c02cffbc63cf2e6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The embedded URL is designed to mimic a search result for a product, likely to trick the user into clicking. While no scripts were explicitly extracted, the PDF structure and the malicious link strongly suggest a phishing or malware distribution vector.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/wb?keyword=pocket%20knife%20sharpener%20home%20depot In PDF document text
    • https://cdn.sqhk.co/liwewajawab/heVmjgw/25128638162.pdfIn PDF document text
    • https://cdn.sqhk.co/lisutovudaf/3jgifgg/undead_tycoon_roblox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423427/normal_5fb6444e1b915.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478928/normal_5fc69e24b8794.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411717/normal_5fc494fb1a485.pdfIn PDF document text
    • https://cdn.sqhk.co/mozejipakas/5iarV0S/ringtone_maker_youtube_android.pdfIn PDF document text
    • https://cdn.sqhk.co/wupifufexix/hijgCge/baldi_s_basics_birthday_bash_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/iaIhjps/71625901184.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b7e548b-e053-475f-9d0d-a8ee894e97a6/pufefilumerimuleliri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7ecf246-6b86-4616-a547-de5df8f375ac/45783609893.pdfIn PDF document text
    • https://s3.amazonaws.com/nisiwanolom/50830478551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b2e361-a7eb-4989-bddc-dcd2f1ffb68f/valuti.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/smaller_file_size_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210ca7ef-97bd-4552-bdea-3f6e15742395/la_ley_de_la_atraccion_libro_gra.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_off0000daa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA4 5428 bytes
SHA-256: 95922be7ab6473c28f08765909434414b0c4e6921db29c8c0a3ce837f136ea3c
font_01_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 10120 bytes
SHA-256: 0a228dfb42da62ca90707ba752aca1c6200dfa5bb2ad78e5aa2cc9546f3f1f9f

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