Malicious PDF — malware analysis report

Static analysis result for SHA-256 357e512b9a425bb6…

MALICIOUS

PDF

78.8 KB Created: 2021-03-21 05:34:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 080b96fc152036d1255e42624cd8101c SHA-1: 28e2ce681851e3dd8da59fae4a3777bbe5b9ac42 SHA-256: 357e512b9a425bb6bb9433a65b16886048351ccd9a86b911a3f2e12f5ee81935
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were extracted, the PDF structure and URL patterns suggest it's designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/strik?utm_term=hp+6500+drivers+download PDF link annotation
    • https://cdn.sqhk.co/pugijuzo/VyIjjif/chhota_ninja_city_runes.pdfIn PDF document text
    • https://gamalisixidu.weebly.com/uploads/1/3/5/9/135958628/383770.pdfIn PDF document text
    • https://lokabema.weebly.com/uploads/1/3/4/1/134109183/2341bb.pdfIn PDF document text
    • http://bt-management.website/vugifubedaz2hufa.pdfIn PDF document text
    • https://fifurinirolegif.weebly.com/uploads/1/3/5/3/135306558/8834243.pdfIn PDF document text
    • http://mugafopame.iblogger.org/jobs_definitions_worksheet.pdfIn PDF document text
    • http://leafester.online/feputj6y2z.pdfIn PDF document text
    • https://tazowodogakog.weebly.com/uploads/1/3/1/4/131437711/215817.pdfIn PDF document text
    • https://nawivavunof.weebly.com/uploads/1/3/4/6/134669961/2547835.pdfIn PDF document text
    • https://cdn.sqhk.co/wixumenez/qHjdif6/zifiwevufodipiw.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/RghehdA/arknights_twitter_cn.pdfIn PDF document text
    • https://cdn.sqhk.co/depifozopupe/qheVNY0/67043008288.pdfIn PDF document text
    • http://supermagazforsale1.xyz/al_quran_englishbtteo.pdfIn PDF document text
    • https://cdn.sqhk.co/woluzadeviv/ififgjb/flashlight_shortcut_iphone_11_pro.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
    • http://jagaxuvu.epizy.com/zigasukozepenekiradawajig.pdfIn PDF document text
    • http://fapujeg.epizy.com/how_to_use_lg_convection_microwave.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/they_say_i_say_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d79acef5-31ba-457c-9d39-d5c50892fdac/dinuvalelidipejelejaxema.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/how_much_do_you_get_paid_in_the_australian_air_force.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad4c9c3-59ec-4e29-8943-bb987ab0b5e4/76888312600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f60f6dd6-a1b3-44ca-b7dc-8bba11c5878c/how_to_teach_sense_of_smell_to_kindergarten.pdfIn PDF document text
    • http://mutidulofof.epizy.com/zomusov.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_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 5196 bytes
SHA-256: 0fdf6da566b37d7778612ca3947173f99c4435d8230ea451521e181dca9b272f
font_01_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 12564 bytes
SHA-256: f52c879b29646dd818b9ff433ddab6137afdd464708b7b8a0c088ac2e017f064
font_02_sfnt_off00011fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FED 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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