Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a36177722cb8ca8…

MALICIOUS

PDF

82.3 KB Created: 2021-03-08 19:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7633039a99b523a4e767802fd3f80786 SHA-1: d7e31a92a338aec5e3c4a0d589c47bd73cca02f7 SHA-256: 7a36177722cb8ca84b168507e1bb1fc4a2144d4fbf9dbf22e4c47e230793fde8
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of numerous external URIs, identified as a link farm on disposable hosting, strongly suggests a phishing or malware distribution campaign. While no scripts were directly extracted, the PDF structure and extensive linking are typical of documents designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://kuzutuzo.ru/award?keyword=bodor+%25C3%25A1d%25C3%25A1m+sinistra+k%25C3%25B6rzet+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470972/normal_6000605d81fc1.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/lutinewekesuvubujave.pdfIn PDF document text
    • https://pevamuwewewi.weebly.com/uploads/1/3/4/6/134636281/jawev.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/rasumitadiduxaxaj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5ff2144382a55.pdfIn PDF document text
    • http://ouily.xyz/nasonerodapivodo4u6w0.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/42654736679.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/logo_design_competition_malaysia_2020.pdfIn PDF document text
    • https://defiduzumuxel.weebly.com/uploads/1/3/2/6/132682342/tatupuwofoke_xakikomizofi.pdfIn PDF document text
    • https://ranezilipevag.weebly.com/uploads/1/3/5/3/135392607/8032816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368958/normal_6012844320707.pdfIn PDF document text
    • http://devicesprotectionforusers.site/wuregabilel9jsb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406473/normal_6000bd9331fe8.pdfIn PDF document text
    • http://electrumwallet.buzz/modern_physics_randy_harris_2nd_editionqc9yl.pdfIn PDF document text
    • https://sawotulexude.weebly.com/uploads/1/3/5/2/135298589/suname.pdfIn PDF document text
    • http://qqkaxes.xyz/42467490143lv24c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474999/normal_6028e2ba55310.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/wordly_wise_3000_book_6.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/82e54483-85e7-41c6-b715-5185cd26f0fe/project_planning_templates_free_download.pdfIn PDF document text
    • http://mijekobafenado.rf.gd/38952524696.pdfIn PDF document text
    • http://wixevudu.epizy.com/pinobazubedofikavininak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43667ad-3c20-4b4b-9856-5c204de35778/fofelesufum.pdfIn PDF document text
    • http://nejovafejasujob.rf.gd/meaning_of_histopathology_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9daf24a5-b30a-4c97-932c-b02e8d28f1a7/who_is_macbeths_wife.pdfIn PDF document text
    • http://bolozenafo.rf.gd/what_does_each_box_on_the_periodic_table_represent.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/fons_and_porter_pickle_dish_template_set.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_off00010314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10314 5688 bytes
SHA-256: 7d0dd698d4d70882572b5b3552f96f0a51119f65038bf2eace31071555670bdf
font_01_sfnt_off00011595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11595 11360 bytes
SHA-256: 37ddaffa9159feb69c0629822a73043c3583e687df95ded39c7f540ef168a092