Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e141b39842185ad…

MALICIOUS

PDF

78.0 KB Created: 2021-03-23 21:33:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2f02182ae92edfd454dd9ce4a661d47b SHA-1: 108cc537e0abd30fb7e68e061c1f2d2b34b72d27 SHA-256: 5e141b39842185adac8c47ea7ccb89b32d415b7a5864869cf5ce71b9fbd6f9e8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common technique for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=reading+activities+for+kindergarten+and+first+grade PDF link annotation
    • http://wtia.space/lolamawudizp7a9.pdfIn PDF document text
    • http://taptopbot.com/my_way_piano_sheet_music_freeumrce.pdfIn PDF document text
    • http://nikaold.site/bokuloxurikurilexdy1u.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/vatakefojunib/dikepepuf.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/basic_english_words_for_daily_use.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/my_amnesia_love.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/windows_10_pro_crack_full_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a044728-b1fb-4440-8aa6-ec349dca98e7/mavupupaginotoxelulizipip.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/librecad_dwg_permissions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afb10e8-7de3-4761-8b2c-93eaf1c1d722/67513456069.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/tv_guide_tasmania.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/44121355998.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/28474149196.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/telof.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_0de6806ba27c40349c07e928f4a9e54e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/44564156224.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/yearly_schedule_template_excel.pdfIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_3ee477c9481742d8994f3706aa084686.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/6342754208.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_off0000f2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F2 5288 bytes
SHA-256: 8d026fb750588725c7e73ac5bad32b4080ba65ebc16758e0974eccf31d6b104d
font_01_sfnt_off00010518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10518 10400 bytes
SHA-256: a42ecb384ba161e14f9dbd72f1fb7c7b2118157930c98a822411a0721bdcd89a

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