Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe8756847270f9b…

MALICIOUS

PDF

96.0 KB Created: 2021-05-06 13:45:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 73f259bf142915e742ef21c8ebcc041d SHA-1: 0184711aff340d5c8c65c7d838aa11faeef6197a SHA-256: cbe8756847270f9b4f3546c34d24228949ab3e7eff0d99c652e9031031777365
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards a malicious document, likely delivered as a spearphishing attachment, aiming to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://zajinet.ru/strik?utm_term=hp+elitedesk+800+g1+small+form+factor+%2528sff%2529+pc+specifications PDF link annotation
    • http://gedatidigog.sportsontheweb.net/how_to_wrap_a_non_box_present.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/meguporexes.pdfIn PDF document text
    • https://zizonilorixu.weebly.com/uploads/1/3/4/7/134772478/limulawewikixozudaf.pdfIn PDF document text
    • http://nitafibejuze.mygamesonline.org/all_bollywood_actors_name_list_with_photo.pdfIn PDF document text
    • https://moxizeza.weebly.com/uploads/1/3/3/9/133999163/lijuzigagabugo-dopegemevowadot.pdfIn PDF document text
    • http://nejoxulogawa.22web.org/convert_improper_fractions_to_mixed_numbers_answers.pdfIn PDF document text
    • http://rirarojafetojep.iblogger.org/33339304204.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_2ce2e54bb2944718bb9ea70bf57896ee.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_2051e57ac0c74706840a1f336f862fb7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b81c46-ffa7-4ae2-bdbf-4e10b474635d/71105851369.pdfIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_8ba9d6980d9c405982212e3496d652c7.pdf?index=trueIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_10ed9ab859034c478077a07976002602.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0845c17a-d28f-482a-925b-d489c1127b4c/how_long_do_garage_door_opener_lights_stay_on.pdfIn PDF document text
    • http://kakavogulogij.onlinewebshop.net/jilekunovumumeriz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2215742f-49d8-49f9-9dcf-888e32620ef7/40679465961.pdfIn PDF document text
    • https://80d0ab3e-5d82-4547-8f02-ffe19150e389.filesusr.com/ugd/776b9b_c2b951a4e8604b00b0c4d784fca12688.pdf?index=trueIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_d17223b8e93a4317986fdea0d5607f96.pdf?index=trueIn PDF document text
    • http://vudebedof.rf.gd/41496202020.pdfIn PDF document text
    • http://xolazituvote.epizy.com/types_of_culture_in_sociology.pdfIn PDF document text
    • http://vurofanosikuga.atwebpages.com/buscopan_simples_ev_bula.pdfIn PDF document text
    • https://acfcda0b-1795-4b40-aedc-9a0bc13047ce.filesusr.com/ugd/89c6ad_91d2986eaa754a8e87cadb7e99c517c2.pdf?index=trueIn PDF document text
    • https://f50ece36-1901-4a7b-9396-968a400df7f4.filesusr.com/ugd/3ecb95_bf30ca46477b44248d1055f13a44cb0f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/308797b8-436a-4416-b516-3ff3c2380557/xemodugudigefuxiturazat.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_off0001202d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1202D 6164 bytes
SHA-256: 3753d8592ac205f3b893acbd55de9527ac30e696537ff3f0192bbcf92cfa39c5
font_01_sfnt_off000134ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134FF 6044 bytes
SHA-256: 443b3b037fdc84b4060dd3688069a998a73894d3261b5ab89c5e613d66684d20
font_02_sfnt_off00014990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14990 11724 bytes
SHA-256: eab1f8e8a64eb252da0931a93fb5af802e4ab8af84bb5cd7123bae98ff177104

Open this report in the interactive analyzer, or submit your own file for analysis.