Malicious PDF — malware analysis report

Static analysis result for SHA-256 6236642dbb6be3ef…

MALICIOUS

PDF

69.9 KB Created: 2021-03-28 20:31:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dfd3cd2f56620c5caa98041b183075e8 SHA-1: 218756dd3a8ce3d4b74b04160b2757897ab34f14 SHA-256: 6236642dbb6be3ef5d8628302cd139fd1b41e874ff0a076f72ebfb9efce557a8
214 Risk Score

Malware Insights

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

This PDF was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs point to suspicious domains, suggesting an attempt to lure users to malicious content or phishing sites. No scripts were extracted, but the PDF structure itself is designed to host and present these malicious 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=getting+from+college+to+career+pdf In PDF document text
    • http://waferaboteb.mypressonline.com/modern_periodic_table_with_names.pdfIn PDF document text
    • http://kugitipozad.22web.org/logitech_k400r_pairing_android.pdfIn PDF document text
    • http://dezowem.medianewsonline.com/vidokudutozobakafus.pdfIn PDF document text
    • http://zosuzalazuxobob.iblogger.org/wazedejokemepex.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/ivermectina_uso_animal_y_humano.pdfIn PDF document text
    • https://cdn.sqhk.co/fosuzonarefi/X6yAhjW/magnificat_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/bejomewuv/Qhagjgc/whispering_woods_resort_minocqua_wi.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/vowiv.pdfIn PDF document text
    • http://tusapet.iblogger.org/suxajifewabomozelimer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/20518585349.pdfIn PDF document text
    • http://dakokaxawizepu.epizy.com/report_writing_sports_day_in_school.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/zigagurazakirifolodiviv.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/bamojelibimefizitevikemit.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/anil_singh_song.pdfIn PDF document text
    • http://vulofuwikiwamor.rf.gd/bangladesh_bank_seat_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/73486759674.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/film_business_plan_free.pdfIn PDF document text
    • https://3b87a2b8-2d13-4e6d-acc4-cbba57692a59.filesusr.com/ugd/50988c_e466ae08f6444bb584e025cd2bc9f83a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/bgp_protocol_packet_format.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/32613581803.pdfIn PDF document text
    • https://5c06e36d-e6a7-492f-989e-88f86e9ca1b1.filesusr.com/ugd/c9ae65_b2be5b96e5824f37a335c1723d7c4265.pdf?index=trueIn PDF document text
    • https://018ae6bf-5b6e-4bf7-bb5f-89503284f855.filesusr.com/ugd/b7931c_baca7ee18b08488aa06bd04ece7471f6.pdf?index=trueIn 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_off0000d591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD591 5328 bytes
SHA-256: 49317c14b551f7da2d71875cef899b0fee22630664d2735b39f88f6d45fcdbd8
font_01_sfnt_off0000e7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 10236 bytes
SHA-256: 208b5e687b9a1a93bd849dd2f2d15a11db8bd95a6e438d269ac0146cf6625bfe

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