Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f275b9cc62012f…

MALICIOUS

PDF

75.9 KB Created: 2021-03-11 12:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ecb2d561c3beddff118a6afc938abf24 SHA-1: 358ec05de00d52a338561ef91533c147a044fc23 SHA-256: 67f275b9cc62012f2289009b93c78a92e04a0d72a6a852c7e496f2286ee19326
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 0.9997

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://dugedepap.ru/award?keyword=small+business+accounting+101+pdf PDF link annotation
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/vejolujexopebuxan.pdfIn PDF document text
    • https://xebagamalod.weebly.com/uploads/1/3/1/3/131383607/1469764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_603424c1cba00.pdfIn PDF document text
    • http://detonic-ufficiale.website/modal_verbs_exercises_bachillerato_w2n8hr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_60413ba847279.pdfIn PDF document text
    • https://mixojokujize.weebly.com/uploads/1/3/4/3/134387696/4ead87345c72f50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493888/normal_6045e305dcf52.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/075c1153de97ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417318/normal_600f03b2f0416.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fd72e41d5d27.pdfIn PDF document text
    • http://4escam-bot.online/71983311494r98pn.pdfIn PDF document text
    • https://soxiforifidulap.weebly.com/uploads/1/3/0/8/130814329/4504200.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/benubapopikaj/united_colors_of_benetton_hot_price.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/brush_for_ps_free.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_0187056f9abf42829674ffed02a259c9.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_12724f71b9024ab4b4ee1eb88fc81b6c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poresi/73316758549.pdfIn PDF document text
    • https://c4cd0dbc-23d7-4f11-b65f-2561cec8abe5.filesusr.com/ugd/516793_3d9b1e85e0f54af2a9ed026d0d514508.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/80996201444.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_6eb31bd580144e178f1f91d5e0a0d807.pdf?index=trueIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_74583a60e4874ad297478771e898262b.pdf?index=trueIn 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_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 5816 bytes
SHA-256: f020f57c062bb9b8fc5909ae2729510dbea8f0a3dd1d80db04ba731df838b2c4
font_01_sfnt_off0000fe55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 10608 bytes
SHA-256: d7483b1f8cb338156b00dce0c1061ad742f5719ff2132e43b7cce8504c91e7a6

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