Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1056572c23ca10f…

MALICIOUS

PDF

67.7 KB Created: 2021-03-23 00:18:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 054a9df7b9241a91deaacdfb021dc68c SHA-1: c7718038a027e0b9e17d6e944c4c11bfff759aa0 SHA-256: a1056572c23ca10fbc84e18b7e4f5d7770dd03a6c23f3febe8105baa7665a338
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a large number of external links, including a link farm, suggesting a phishing or SEO manipulation attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, but the presence of numerous external URLs indicates a likely attempt to redirect the user to malicious or deceptive content.

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://mezovuduw.ru/wix?keyword=best+pedicure+in+greensboro+nc PDF link annotation
    • https://cdn.sqhk.co/rasetiwulipu/iajaQjh/13050555623.pdfIn PDF document text
    • https://wozepunelom.weebly.com/uploads/1/3/5/9/135993859/livigova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5ffa727d36bad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465545/normal_5fc9e3477286f.pdfIn PDF document text
    • https://cdn.sqhk.co/zakolemafemo/yA1Zjf8/80104699600.pdfIn PDF document text
    • https://cdn.sqhk.co/fekoguwiwu/gheYifu/free_offline_music_apps_for_ipad.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/ZXgfibk/old_dominion_freight_line_driver_application.pdfIn PDF document text
    • https://cdn.sqhk.co/wofetewa/Fjhiffq/directv_billing_dispute_phone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368782/normal_601fc89ec63f2.pdfIn PDF document text
    • https://fukusegoboviv.weebly.com/uploads/1/3/1/8/131856281/rusebuwewutapagi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472488/normal_60088477baab8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446382/normal_5fe5450333ee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_605713b5c30fe.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/jbihghi/95464269891.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/hfhgzIH/stars_mario_galaxy_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425913/normal_5feb289121ec0.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/f8lXxhe/cheat_sheet_meaning_in_marathi.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://uploads.strikinglycdn.com/files/7d98861e-d9d8-43d6-abf9-bbebb4f0d1f7/ink_for_hewlett_packard_4500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/defcb7b2-52c3-4552-98b3-cba734efbecb/ferivamiruluwojin.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_off0000c1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D2 5072 bytes
SHA-256: ac9e018786e99d0690f8c777ff0877f2f43de82beff6c78f9904a132ebda4d62
font_01_sfnt_off0000d316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD316 9904 bytes
SHA-256: 2a511c390cd3040a2a233f52f23317c0fba80373eafaf8b744aab2531f754310
font_02_sfnt_off0000f4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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