Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8addf77c722bb2…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 14:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f350a24156d5a03ccf07b89d7b77637c SHA-1: d427e05b5fee5c597792b29491ed9f50b5750cf7 SHA-256: 5a8addf77c722bb2c62e29699186355fc78b6790543f11fcd3407a0d3f2c9d92
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://jumiwimov.ru/strik?utm_term=the+road+less+travelled+m+scott+peck+quotes', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to quotes, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/strik?utm_term=the+road+less+travelled+m+scott+peck+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418381/normal_602cb95006deb.pdfIn PDF document text
    • https://debagodijif.weebly.com/uploads/1/3/0/9/130969595/8088943.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/gcyPoib/spiral_ham_on_camp_chef_pellet_grill.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_6025af8113b99.pdfIn PDF document text
    • https://xumejiti.weebly.com/uploads/1/3/4/5/134529375/f39295d.pdfIn PDF document text
    • https://cdn.sqhk.co/jebanufebejo/Igcemgd/51296320762.pdfIn PDF document text
    • https://fetedujas.weebly.com/uploads/1/3/0/7/130776810/jerupabibezo_jewimufulojowo.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/ighghiS/sunetuki.pdfIn PDF document text
    • https://dinijituwit.weebly.com/uploads/1/3/1/6/131606252/nasovexoweguda_waxuvusixekawuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414696/normal_6048f02f7c7b3.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/KhaHgiD/rofidanimatebixikil.pdfIn PDF document text
    • https://cdn.sqhk.co/xurawupo/eQdVgjd/mikupazixobikewugifate.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/kurepanop-favipuvelaroko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413980/normal_601daf42e2af8.pdfIn PDF document text
    • https://cdn.sqhk.co/dilijenaka/fjsEXk9/88654836405.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/paxunu/humira_complete_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/bopup.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/towalulek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4bb8cb-578e-432d-81ee-85aefa410c5d/8384656607.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/babizavitewigibuvi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70759b76-5288-4279-9911-576af1de46a4/is_it_worth_to_learn_android_development_in_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/11153833958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57284cdc-3003-4103-bc4e-cd523d860384/49843129135.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_off0000ed3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3D 5512 bytes
SHA-256: b71a68363f9cabee539735d9adfcda7192eed7816fb6a93d58d175394d5da727
font_01_sfnt_off0000ffd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD7 11572 bytes
SHA-256: a53798d59e0f726e6100582c047c2f6a6abb25ca19c3bf4ef93dd83ec278c179

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