Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04fbeb8210a7d51…

MALICIOUS

PDF

77.2 KB Created: 2021-03-24 16:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: fb95fcdd1ecdf184522e7bc13961e377 SHA-1: 474c5b9f47c3b8cedb07d92bf7a5716d2a293043 SHA-256: d04fbeb8210a7d512cdef435eb7e3d30c93fd5bdfddb3e0450c3c991c5ffb38f
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It functions as a link farm, containing numerous external links, with a primary URL related to plantar fasciitis exercises. The document's structure and embedded links suggest an attempt to redirect users to potentially harmful sites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://xajibur.ru/aws?utm_term=how+often+to+do+plantar+fasciitis+exercises PDF link annotation
    • https://cdn.sqhk.co/rotusorukazi/aMgjUhi/vba_activesheet._showalldata_erreur_1004.pdfIn PDF document text
    • https://cdn.sqhk.co/kinuneba/jgylhhI/90961241278.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/jghepjd/alarm_clock_xtreme_timer_pro_apk.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/sesilam.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/ehdqpgf/furafujebefewuvoded.pdfIn PDF document text
    • http://gumugupibope.iblogger.org/asus_rt-ac68u_parental_controls.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_f5a9a8eedfed4ba39e81d67a41f57fd5.pdf?index=trueIn PDF document text
    • http://zivakafipudejiw.epizy.com/30956293886.pdfIn PDF document text
    • http://pulawev.epizy.com/connectwise_university_report_writer.pdfIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_6c92ea40ef2d4dd7a2d01e03bae8533d.pdf?index=trueIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_8c52bbf3ae104f24936b8815bc17c218.pdf?index=trueIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_0994f7d4ef724d42a876d2ec58b1970c.pdf?index=trueIn PDF document text
    • https://37e0f79d-b0c1-4727-b76d-5b759c81288f.filesusr.com/ugd/9c66ff_ffa8233d5d8d43b79ffc8466983a8e0f.pdf?index=trueIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_426ce779832e4f2e900b5924e7fdc27f.pdf?index=trueIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/mass_effect_andromeda_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/bollywood_movie_website_name_list.pdfIn PDF document text
    • https://e4586023-485a-43f1-9451-2d404684c5b7.filesusr.com/ugd/95ff22_e16ab8fa3a7844e88f43df366fe14ba7.pdf?index=trueIn PDF document text
    • http://wofuxuvo.rf.gd/62142835852.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_04dac4b780d84909bd861ee6c5cccc56.pdf?index=trueIn PDF document text
    • http://mawokale.myartsonline.com/describing_physical_appearance_esl.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/sumosugaboxo.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_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 5272 bytes
SHA-256: 48b2e44838c5ccd49884ab8f4cb725070b7f451d2758e8cdb49291ecc73e1726
font_01_sfnt_off0000ffd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD1 10916 bytes
SHA-256: 212e94e30db52869475876ea9a8c956bff0482c77848ea7a9896387bf2309282

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