Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0a6f3455d7d33d…

MALICIOUS

PDF

127.8 KB Created: 2021-03-24 11:53:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ce93c62735ba925c0cdd4c154c5a2c2f SHA-1: 7af39800943dee62c8433caf7fe038549117d9da SHA-256: 7d0a6f3455d7d33d0be5839b15145f667c0c7f9dcb89e5ee317695af856a6038
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The embedded URLs suggest an attempt to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=marantz+cassette+deck+5220 PDF link annotation
    • https://cdn.sqhk.co/dogutadova/jaLibVe/patolebaraguzirazakogij.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/jliedjh/rasuwojizupubusabofigexok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_6048633f0cebb.pdfIn PDF document text
    • https://cdn.sqhk.co/wusuzevomo/hg0hiCF/lenovo_thinkpad_x1_fold.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496853/normal_602073021af68.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/gawabog/79665209387.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_e2d0893290ac49fe9f80be96be1ce1ec.pdf?index=trueIn PDF document text
    • https://0879403c-3be5-48e4-925f-21334a7d5cfe.filesusr.com/ugd/407fcc_bd085302e7854171a5125fbc5fabcab2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/84969721058.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/brick_mansions_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/define_canonical_form.pdfIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_d7e321271249450994709a225bedb9b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/telasebisu/zevogavagexajokosafejobav.pdfIn PDF document text
    • http://mobaramitutukox.rf.gd/13685665111.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/congressional_research_service_reports_public.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/95529133565.pdfIn PDF document text
    • http://xuneviwek.epizy.com/carillas_de_porcelana.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/twitter_live_video_online.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
stream_002_off0000d162.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD162 72752 bytes
SHA-256: b01554bf95d25529e27cc234aa40959da44016eae3cb3bed1e6bb536b994daf8
font_01_sfnt_off0001ad53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD53 5420 bytes
SHA-256: 134f916faca8ff6015c142ec94ab16f7b034f87056e2a4de6e765a56fa0063db
font_02_sfnt_off0001bfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFE9 19488 bytes
SHA-256: 7ef7159bc3723760fb89c833b304e44b037a429d58dcc4097b518901f535dca3

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