Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff14497885bcf98…

MALICIOUS

PDF

69.9 KB Created: 2021-03-09 11:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 373ddd902353a3903636f8a2acf94fe3 SHA-1: 73f6a0c390bd3e1175719a486d4cccb73569f302 SHA-256: 4ff14497885bcf98a40b54e40dc77b0f6ceac4e10908b8ac0bcf078ec50cda54
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm pointing to suspicious domains like 'fdvsefwfrw.space'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/wix?keyword=who+is+the+killer+pic+answer PDF link annotation
    • http://fdvsefwfrw.space/324634122049h1ih.pdfIn PDF document text
    • http://hiziryigit.online/pufagvowy6.pdfIn PDF document text
    • http://foodguideblog.com/wapokixujelejie7v72.pdfIn PDF document text
    • http://lifeeuro.info/youcut_video_editor_for_pc_free54zrn.pdfIn PDF document text
    • http://nebo-baikala.ru/english_listening__speaking_practice_-_listen_and_repeat_the_sentencesw5ctn.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/mejados/38941585180.pdfIn PDF document text
    • http://vavukewapufusa.epizy.com/torah_is_sacred_book_of.pdfIn PDF document text
    • http://dunupilopun.epizy.com/38529985985.pdfIn PDF document text
    • https://d09251a9-b09e-4077-8ccb-24037f005f7b.filesusr.com/ugd/a6ce17_7c0a370dfcb244f0852fb12c1bcc14d4.pdf?index=trueIn PDF document text
    • http://paxafumalinuber.epizy.com/gmat_official_guide_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/my_favorite_dog_breed_quiz.pdfIn PDF document text
    • http://vigamoburijom.rf.gd/88238552951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d41cd2-6356-4f14-b889-1fcd8aa54898/honda_rancher_350_carb_diagram.pdfIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_d220f576ca5a4131a01145827e7ddc44.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tapexiw/mulogukirubivanemoruvilo.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_110ecff0d99e4460bd30f2371b6cd55e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/zalovivimolimemifolimire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1abba428-5e2e-4da6-b411-4dd391036f92/understanding_the_quran_book.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/pedenigelujotofireginin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406b0d78-a1af-40b4-872c-062e6326cf50/are_the_harry_potter_movies_as_good_as_the_books.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_ac349c32942f48fbada36d3b36134cb1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/480c1ff3-add5-4113-bf5f-a0b2c3857f2e/grammaire_progressive_du_franais_niveau_dbutant_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/bloody_roar_4_pcsx2.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/thesis_defence_questions_and_answers.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_off0000d48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48E 5188 bytes
SHA-256: 5cc4c8b2bc286f7ec8af5421ce9cada3804d70abcdc53b22bdd3e1bae4dbaa2f
font_01_sfnt_off0000e646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE646 10672 bytes
SHA-256: 1f07adffabfeb53a5b399e8d25359733ab5dd225689b8a5ab4aa5acd98d0e2e8

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