Malicious PDF — malware analysis report

Static analysis result for SHA-256 e181c5053d78a569…

MALICIOUS

PDF

78.2 KB Created: 2021-03-05 02:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b9a2cddad711ab9aa07a043a5d3d7cc7 SHA-1: 2f19a81675b3ea92278e3a4b234b0b14b3d5c7a1 SHA-256: e181c5053d78a569cd905deb872d03af2225dfe891ef195c122157ee54dba4f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or SEO poisoning tactic to distribute malware or phishing content. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=what+are+the+three+properties+of+bases PDF link annotation
    • https://tiforunu.weebly.com/uploads/1/3/1/4/131437018/fc1feb8f.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/biicmbV/b_52_bomber_shot_down.pdfIn PDF document text
    • http://dududuw.mypressonline.com/how_to_set_the_citizen_eco-drive_skyhawk_watch.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/xfinity_approved_dvr.pdfIn PDF document text
    • https://xilasofuvi.weebly.com/uploads/1/3/4/6/134651230/aaba81c3e9a.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/what_is_tqm_and_why_is_it_important.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/subway_surf_hack_download_pc.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/how_do_you_write_a_simple_lease_agreement.pdfIn PDF document text
    • https://vegekonewipure.weebly.com/uploads/1/3/5/9/135964828/7872098.pdfIn PDF document text
    • https://cdn.sqhk.co/fepefudasor/viarAib/pottery_barn_code_october_2020.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/5868449.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/covid_19_testing_in_my_area_free.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/tizowodifi/idsa_guidelines_diabetic_foot_ulcer.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/86700595976.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/how_to_reset_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/ant_junit_report_empty.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/how_to_install_xfinity_cable_box_to_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/dumipexirofix.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/povutipurodiwimalabafop.pdfIn PDF document text
    • http://vebagakid.onlinewebshop.net/what_is_fanuc_cnc_programming.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_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 5108 bytes
SHA-256: 672a96a1668fe0dee3d281d998409c07902fc6c7b1037b3e5f2fc8c2c23b33c2
font_01_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 10680 bytes
SHA-256: d8df599205ed45f75625ccb1dcc045a117aa105f5dea5f56725483997f0850b8

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