Malicious PDF — malware analysis report

Static analysis result for SHA-256 694bd84110fe00eb…

MALICIOUS

PDF

84.0 KB Created: 2021-03-29 00:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 79fa924e0f9ec374983fc1b371705fb7 SHA-1: 7d3f3d54c3bd1a815c20f1a571172972b378d2e5 SHA-256: 694bd84110fe00eb35b92527e0c319a071ac205f32cc1a4e35e8ff527e8e3ee2
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, contains keywords related to learning piano, likely a lure to disguise the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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/award?keyword=apprendre+le+piano+livre+pdf PDF link annotation
    • http://nikawixuvaxi.iblogger.org/leila_prayaag_akbar_download.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/25067390475.pdfIn PDF document text
    • http://godanikowej.iblogger.org/11875285160.pdfIn PDF document text
    • http://help-mediasupport.com/beats_by_dr._dre_-_solo_pro_more_matte_collection_wirelessotgy6.pdfIn PDF document text
    • http://axecheat7.xyz/hp_officejet_pro_8600_treiber_windows_8.1_downloadk2no5.pdfIn PDF document text
    • http://kushtanash.ru/20521302862xl8jj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445864/normal_5fe74bfe092e3.pdfIn PDF document text
    • http://repair-foto.ru/38037471154j12y2.pdfIn PDF document text
    • http://4338bacchus.com/the_ancient_secret_of_the_flower_of_life_wikiklvoj.pdfIn PDF document text
    • http://mekapidi.medianewsonline.com/27806203975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_6019e0c312eef.pdfIn PDF document text
    • http://bexemusu.mypressonline.com/18453135479.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_6047ce2542fbe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gelifadewew.rf.gd/melting_point_of_benzoic_acid_lab_report.pdfIn PDF document text
    • http://bideliv.rf.gd/alpine_mrv_1000_manual.pdfIn PDF document text
    • http://riboparewi.rf.gd/tijomajepiwupetoxodebar.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/vusotenelavavezeka.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/peraxusexapotumupoguz.pdfIn PDF document text
    • http://sujegulagu.epizy.com/62235117630.pdfIn PDF document text
    • http://kiwajuku.epizy.com/bibliography_apa_format_dictionary.pdfIn PDF document text
    • http://kajifota.epizy.com/brain_gym_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/dororavafimosijubowofalit.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_off0000fd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD59 4616 bytes
SHA-256: be1aa38b38a097b85247fe35a185c0c2715d60e1aa9ccf0733a565378a8b6d23
font_01_sfnt_off00010d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D09 11892 bytes
SHA-256: fa2f53f29fe1670a08dd2135b6945b61403a7e712c40bfcf4d67de2fed9e4882
font_02_sfnt_off000132e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E4 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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