Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14375114fd5d73d…

MALICIOUS

PDF

95.4 KB Created: 2021-04-24 14:01:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: db4b4f21132ce22be19df22b42ab9863 SHA-1: 2411ba6f4e6804269b199611687613e1aaac00dc SHA-256: f14375114fd5d73d8ccb6d343ed1a14ccfac1b7f75e3bbb1c4579215cd676cba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the use of link farms on disposable hosting, reinforcing the malicious nature of the embedded links.

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 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://dugedepap.ru/strik?utm_term=a+new+handbook+of+literary+terms+david+mikics+pdf PDF link annotation
    • http://nupewijanetari.medianewsonline.com/86677745731.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/35197266950.pdfIn PDF document text
    • https://pisotojike.weebly.com/uploads/1/3/4/5/134594110/7460249.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/nipelir.pdfIn PDF document text
    • http://lojuxaga.mywebcommunity.org/synonyms_and_antonyms_list_for_competitive_exams.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/is_death_note_netflix_movie_good.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444357/normal_602b28f916cbf.pdfIn PDF document text
    • https://zipezeroluxufa.weebly.com/uploads/1/3/4/9/134904793/lixoparam-babopogulov-kolepud-pagadozatagawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_6041b4f159c51.pdfIn PDF document text
    • https://navuvosukogeguf.weebly.com/uploads/1/3/1/4/131454151/8440013.pdfIn PDF document text
    • http://gelokan.sportsontheweb.net/nikon_f5_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_5fd1cd059f0e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_601b2cce9963d.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/45901527082.pdfIn PDF document text
    • http://vasizazesunof.medianewsonline.com/zobukawemopewuzijuzafuvo.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/amu_entrance_exam_syllabus_for_class_11.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/foweguta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/century_21_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/datokufekasal.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/70729119443.pdfIn PDF document text
    • http://jamenajiko.myartsonline.com/tagalog_christmas_songs_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/2006_honda_civic_si_oil_filter_location.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_off0001347e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347E 5840 bytes
SHA-256: 403241958ce98fdae2539739917ccf03d75211149e6fd529d0b430f7e76d7363
font_01_sfnt_off00014852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14852 12780 bytes
SHA-256: dfb81455d5e4e185120326164546a01e9a0aec5c7d5e0db0e4f21d4dfdc1b706

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