Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac94fa8e56f7063…

MALICIOUS

PDF

75.8 KB Created: 2021-03-26 08:16:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6261acad2e4f9ee8e8c3ff65eddc9cfa SHA-1: b064951fb0fd8d84a79cb17506a3d5edfc39035b SHA-256: dac94fa8e56f7063042b82c2efd3e29c9dc3bf70838ebf5d6a4cecffe96fefb5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://mezovuduw.ru/123?utm_term=bajrang+dal+video+song++pagalworld PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455207/normal_5ffc224b0cfbe.pdfIn PDF document text
    • https://cdn.sqhk.co/genedofe/heghjwN/church_member_information_sheet_template.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/jhKYhXn/11208167540.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480142/normal_5ff25a1f558ff.pdfIn PDF document text
    • https://rejobasagiletez.weebly.com/uploads/1/3/4/6/134642313/3ee3ff9e2e0064.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/1215a4f9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_600baa7fb686e.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/velilufewaverew-samubutode-puduwaxub-logajago.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/pufarigivozujemesaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_6051855522f06.pdfIn PDF document text
    • https://wazalitewisoka.weebly.com/uploads/1/3/5/9/135960923/gidatojuxewafa_laxaledamoza_wezoxakov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_604637281d714.pdfIn PDF document text
    • https://cdn.sqhk.co/josurowelimu/0Jjdjay/rejixut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/kabhi_alvida_naa_kehna_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/97155050201.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/nios_pdpet_assignment_front_page.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/83941423436.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/how_to_turn_off_child_lock_on_lg_inverter_direct_drive_dishwasher.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/56291413940.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/53345538841.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/ortopedia_y_traumatologia_fernando_silberman.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/62950945295.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/delaware_corporation_annual_report_sample.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
font_00_sfnt_off0000d995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD995 5404 bytes
SHA-256: 0111f1b7fb8446b670fb470a238e96ac7e33fef5a3d53a711699494e2e8af2a4
font_01_sfnt_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 10872 bytes
SHA-256: a2bb84f23617eaa2aad5750c6584b9890a7b210265d0813771ac1c4a2a9f99d4
font_02_sfnt_off00011140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11140 3816 bytes
SHA-256: 1878c3988edc5ad68dfebef360281f5f93dd78e552c591296ac5741973446662

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