Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1212f56f095a7d9…

MALICIOUS

PDF

81.3 KB Created: 2021-02-28 11:11:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4465e00919218c0bdf5f566a3700e7f4 SHA-1: 2894d6fb98302334d60b988270e9ab4c3d906be2 SHA-256: d1212f56f095a7d91ef09c7a67185f5ab7ac5037eb49b77fe2592bf1eed9b35f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://bologen.ru/strik?utm_term=romeo+and+juliet+2013+full+movie+eng+sub PDF link annotation
    • https://kakifiku.weebly.com/uploads/1/3/5/3/135347754/fuvimumawaro_kozogalonu.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/jDijjar/80167789757.pdfIn PDF document text
    • http://dunewewibi.22web.org/63317427417.pdfIn PDF document text
    • https://cdn.sqhk.co/disanefamu/6VdSOgj/do_you_say_hi_in_korean.pdfIn PDF document text
    • http://tujozavido.66ghz.com/14203860520.pdfIn PDF document text
    • https://cdn.sqhk.co/fiporalisu/gcbqNgj/73668663424.pdfIn PDF document text
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/lijosajagowive.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/powotub.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/O8djcgU/guilty_pleasure_movies_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/doiCzQw/frontline_commando_world_war_2_apk.pdfIn PDF document text
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/dd5973be3f79.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamiwumewamem.epizy.com/bio_rad_cfx_manager_free.pdfIn PDF document text
    • http://medezuwojow.rf.gd/definition_of_formal_communication_channels.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/73531690237.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/bcbsm_medicare_advantage_prior_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/accounting_software_tally_9._2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/vapojililodofigowum.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/momuzikefasolugo.pdfIn PDF document text
    • http://dizoleline.epizy.com/alright_or_all_right_yahoo_answers.pdfIn PDF document text
    • http://joriboka.epizy.com/50237577032.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_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 5904 bytes
SHA-256: 60fcd32cd9708ba3411d1c064e1bd5a9f928c179f16c368814a457edeced6d46
font_01_sfnt_off00010f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F73 13380 bytes
SHA-256: b4bf6b571033a4caa74560cbc57df153211802c16e1425880c89fedd86355153

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