Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf346ceae7a2493f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 03:34:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e581717a8fed1bdb0fb1bb4d51c8a844 SHA-1: d522a98c3c489ddd6629de8cd28bd69abcb21a69 SHA-256: bf346ceae7a2493f9b83d2940a6ad02236e3a6a510756885c213451d6f19004a
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 of which are disguised as legitimate documents, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs point to domains that are likely part of a campaign to distribute malware or conduct phishing operations.

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://dugedepap.ru/123?utm_term=clark+c500+forklift+brake+parts PDF link annotation
    • https://cdn.sqhk.co/rifasidajika/icKgdcI/dolesekoranuzulivexufi.pdfIn PDF document text
    • https://peliretoru.weebly.com/uploads/1/3/3/9/133997281/9249323.pdfIn PDF document text
    • https://pebizadovabunal.weebly.com/uploads/1/3/4/7/134711288/risolined.pdfIn PDF document text
    • https://ketadamofexawun.weebly.com/uploads/1/3/5/3/135349072/pixabikuku.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/gfiRqgE/online_marketing_course_beginner_to_advanced_coupon.pdfIn PDF document text
    • http://pawezujexas.mywebcommunity.org/walls_of_babylon_height.pdfIn PDF document text
    • https://cdn.sqhk.co/buzunonoj/ihiaa3g/dijadijoriwavepozu.pdfIn PDF document text
    • http://viwaginuf.iblogger.org/vizukanopu.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/zejepalininito.pdfIn PDF document text
    • https://cdn.sqhk.co/wupofolizaj/8aSpjgd/star_wars_legion_dice_set.pdfIn PDF document text
    • http://pumaguli.scienceontheweb.net/74028148018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxumokuri.epizy.com/ausfhrlicher_lebenslauf_beispiel.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/78030834584.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/brainpop_scientific_method_activity_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/gruppo_campari_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/givabok.pdfIn PDF document text
    • http://relumewamamit.rf.gd/a4_brochure_template_ai.pdfIn PDF document text
    • http://mutijisugo.epizy.com/andromax_tools_versi_4._1_2.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/44168218471.pdfIn PDF document text
    • http://vudukuk.rf.gd/xonuguwe.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA7 5384 bytes
SHA-256: b95168326527c28fa266db8afc277270941e559afbf8941c135e5702377269f6
font_01_sfnt_off0000f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off0000fd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD66 11248 bytes
SHA-256: d2a6087c160b6b78778029004fd40fe487566df9afb1381049aaf221f47d169f

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