Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3092cabd61827f…

MALICIOUS

PDF

79.2 KB Created: 2021-05-20 11:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f3ebfaaeab556fb8d7f850f01f400bcb SHA-1: 57d84a11923af45e9a462b1c3e1f6d9a4eb4e943 SHA-256: 1b3092cabd61827faaa223ba9a15ce7c40bb4072adadf436a3cc4ddb0a545e23
156 Risk Score

Malware Insights

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

The PDF file contains a lure related to resetting an Amazon Echo device, directing users to a suspicious URL. The presence of numerous external links, many of which are benign, suggests a link farm or SEO poisoning tactic. ClamAV and ML classifiers confirm its malicious nature, identifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=how+to+reset+amazon+echo+3rd+generation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465127/normal_60464352e4ec1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421934/normal_5fdf2abfce007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_604b80714c16e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_606190cacebd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469105/normal_601cd326f3888.pdfIn PDF document text
    • https://rugepokowefi.weebly.com/uploads/1/3/5/2/135294276/4869ec4c9be5.pdfIn PDF document text
    • https://rejoxaratexudo.weebly.com/uploads/1/3/1/4/131453252/pajonevew_gijedizurevoje_jikujibo_xepupanametuwes.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/4bb7769c-69b8-467d-8199-ba853e54d019/27935573725.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/angry_birds_epic_apk_mod_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/35962295936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c45501-a3e4-4734-9207-d58976afe0a1/lg_hbs_920_price_in_pakistan.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/film_frozen_flower_bahasa_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/10352029605.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/ukulele_songs_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/study_guide_chapter_3_section_3_amending_the_constitution.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/56989741514.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/edenpure_gen_40_heater_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ffa6448-c4d4-4d0d-bd99-e09db80b1d42/ragepajijus.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/zirisurilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a756247-724f-4da3-9b4f-b6216e9e16a3/download_windows_8.1_enterprise_64_bit_iso_activated.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/46942633543.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/84800615307.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_off0000f62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62F 5588 bytes
SHA-256: c89f8f10a14ad764a68a6924e50870769d8a407cda74821417eacc0df18adf58
font_01_sfnt_off0001091b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091B 11160 bytes
SHA-256: cab0149bee7ff2ae89f6795966af8bec233f10180de12df557ce2ed12aaae536

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