Malicious PDF — malware analysis report

Static analysis result for SHA-256 6188b2cca14bbe63…

MALICIOUS

PDF

73.5 KB Created: 2021-03-07 22:55:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 34eb4f42f467640e75ae2e1c915b4c02 SHA-1: 1f5af45751f2aa323870be6a024e446946308139 SHA-256: 6188b2cca14bbe638d7a2ae3ae7dc804057c9a3c5f234f70eb0e0e9dd2d76060
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The document body, though heavily obfuscated, contains keywords related to search queries, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://xezojetit.ru/wix?keyword=michael+buble+wedding+processional+songs PDF link annotation
    • http://labiosdewonda.com/625982060079dp13.pdfIn PDF document text
    • http://umdtheatre.ru/meanwhile_elsewhere_russian_revolution_answersktftb.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/anNoAWz/kiko_running_sushi_am_westpark_ingolstadt.pdfIn PDF document text
    • https://cdn.sqhk.co/gixedomawa/QPmgcfr/infinity_symbol_alt_code_chromebook.pdfIn PDF document text
    • http://tehnoprom.org/46195706325n9f0k.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/povufisizoguvrpalw.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/xuwotumadova.pdfIn PDF document text
    • http://kifejuja.medianewsonline.com/the_body_book_roz_maclean.pdfIn PDF document text
    • http://wow50.pro/2016_coleman_lantern_17bh_specszo3hb.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/jbhawgd/starting_over_lyrics_korn.pdfIn PDF document text
    • http://mekapetakosa.22web.org/acc_hyperlipidemia_guidelines_2018.pdfIn PDF document text
    • http://kovatafob.mypressonline.com/penguin_bio_wheel_200_troubleshooting.pdfIn PDF document text
    • http://arfesopt.com/rexoresabeniperata0ixnl.pdfIn PDF document text
    • https://cdn.sqhk.co/sisalubitot/U1dnyHf/96564517999.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/ggijjgY/natcom_top_up_app.pdfIn PDF document text
    • http://muzomabavima.medianewsonline.com/sole_e35_installation_manual.pdfIn PDF document text
    • http://scm03.ru/starting_electronics0joit.pdfIn PDF document text
    • http://ideaita.fun/14430939721n6sqi.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/punurum/how_to_write_a_report_for_a_case_study.pdfIn PDF document text
    • http://rurukiku.rf.gd/24646064424.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/susipugilevekitaxasem.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/piwesejixufusid.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/what_order_should_you_read_the_harry_potter_books.pdfIn PDF document text
    • http://wufizomofoduzin.rf.gd/kipafalaviged.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_off0000e251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE251 5572 bytes
SHA-256: f833f93e765642e1935060fe607cbd128d7186824922749c0b6be699e7b1c8cd
font_01_sfnt_off0000f551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 10336 bytes
SHA-256: 819ba4f15093b1e0eefaf10c4c491024464c5dfece78236a5022ad1b427b4661

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