Malicious PDF — malware analysis report

Static analysis result for SHA-256 38ec6b22dbce7a16…

MALICIOUS

PDF

96.7 KB Created: 2021-05-24 22:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 043aa66cc63d8e118a7c36c18e33357c SHA-1: 1fbbc9ccd954a191e6bd9de10e2d0da84bb499c0 SHA-256: 38ec6b22dbce7a16e606b7732ed22ef7daf53b4c65131754b6d57e3d9bf2fc1b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to seemingly SEO-optimized PDF documents hosted on various platforms. This behavior is indicative of a link farm designed to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these linked documents.

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://xezojetit.ru/wb?keyword=nikon%20l35af%20camera%20loading%20film PDF link annotation
    • https://mowejeli.weebly.com/uploads/1/3/4/6/134672800/5331353.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/7bbe4d0969ab.pdfIn PDF document text
    • https://federadedeladol.weebly.com/uploads/1/3/4/6/134626130/woranibozot.pdfIn PDF document text
    • https://faripolugariwel.weebly.com/uploads/1/3/1/4/131453512/ed19678.pdfIn PDF document text
    • https://jinugavov.weebly.com/uploads/1/3/4/4/134438703/6739420.pdfIn PDF document text
    • https://sumajodezidozi.weebly.com/uploads/1/3/3/9/133997227/deruniwevedenofa.pdfIn PDF document text
    • https://juziwujaxizeze.weebly.com/uploads/1/3/4/6/134685910/giwulorij_nadudusenofu_nipigewowizamid_roriv.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/6536580.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d625cc-dd2e-4b67-9a95-4b5d17309c3e/keto_diet_meal_plan_for_a_week.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/76044445432.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/alleluia_handel.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/android_mobile_emulator_for_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0338a6ad-c440-4954-a681-63ed5b913e28/xumafidudosiw.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/herefordshire_and_ludlow_college_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/373573562.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/what_if_god_was_one_of_us_original_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1071f86c-ea5d-42c8-a5f2-773c03039820/skyrim_how_to_get_smithing_to_100_command.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/web_hosting_agreement_template_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fcbb45e-bd45-4bd4-bba5-186ae1a3cd53/xugawigeletupigakisodoso.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/fivubizoligiwabozugukowe.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_off00013a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A55 5484 bytes
SHA-256: 4c6ec07fc22a073b48341f4e3826524085e6c1e0c66211679034a43aa4124514
font_01_sfnt_off00014cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CFA 11920 bytes
SHA-256: e38ce9d222f96442366333b9fb9a7d3a6a491c7484719992d02da37eee8cf7d8

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