Malicious PDF — malware analysis report

Static analysis result for SHA-256 e71f24f6af1cf2e2…

MALICIOUS

PDF

84.0 KB Created: 2021-03-24 10:35:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ab1e14fb65346eaa1bb2670c42c3ac74 SHA-1: ac9ae12a533b213ed04fafd1c6c4b8a66e48e024 SHA-256: e71f24f6af1cf2e29e3d6ba368454d07e4c8e8c97f5ce18aa112dd412890bd06
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic flagging it as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or SEO abuse. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content hosted on external domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/award?keyword=fresher+party+anchoring+script+in+marathi+pdf PDF link annotation
    • http://ladujose.sportsontheweb.net/46430351146.pdfIn PDF document text
    • http://wusator.mygamesonline.org/what_is_glycolytic_system.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5ff4cf557f3cb.pdfIn PDF document text
    • https://moforikegumiret.weebly.com/uploads/1/3/2/6/132680993/bosoruluzesuz.pdfIn PDF document text
    • http://becloud.website/what_is_the_sweetest_iced_coffee_at_dunkin_donutsn4d98.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/what_is_the_distance_between_the_equator_and_tropic_of_cancer.pdfIn PDF document text
    • http://trafikcezaodebayisi.com/wuzekejiwm0t15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530712/normal_5ff24e55206db.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/pdf_to_doc_converter_zamzar.pdfIn PDF document text
    • http://finansi-7.online/onan_4000_generator_parts_manualu8c80.pdfIn PDF document text
    • https://tazanuna.weebly.com/uploads/1/3/5/9/135977230/2042700.pdfIn PDF document text
    • https://wotipivas.weebly.com/uploads/1/3/1/4/131482993/ee93415.pdfIn PDF document text
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/rovufo-pagikuwes-lewumemapime.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/39638599-110f-411c-bd74-8b31188970b4/kikizopofogenazekuf.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/zorogewerurejeji.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/sorimazu.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/wiguxarinanilup.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/the_handsome_collection_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a6be06-b63e-486e-bd52-f5be76f63ebf/lyrics_to_cross_over_to_the_other_side_of_jordan.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/all_android_version_name_list.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/honda_harmony_1011_deck_belt_size.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_off0000fa82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA82 5380 bytes
SHA-256: da268d180a92f0d2924e489b00597197b9b922bff69f54c4510d4c6addb0ad45
font_01_sfnt_off00010ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA4 11100 bytes
SHA-256: c994cc72edfecfd21a050052e360c5999176a3f6239817a56d9367f036b940b6
font_02_sfnt_off000132d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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