Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb889431502f042…

MALICIOUS

PDF

78.8 KB Created: 2021-03-11 06:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e75ea9afdf9eb2b75aef72b8a99ca057 SHA-1: 566873c29a9f7502df052df6122bc30317bfae42 SHA-256: fcb889431502f042885259ee6315fa1ac3cf3b9c3e7a74122d3009c821127164
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The document body, though partially corrupted, suggests a lure related to 'types of bituminous materials pdf'. The presence of external URLs, including those flagged as potentially malicious, indicates an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/award?keyword=types+of+bituminous+materials+pdf PDF link annotation
    • http://levantemosaic.com/617464550138nqe6.pdfIn PDF document text
    • http://blockhcain.host/does_moen_offer_lifetime_warranty8zwkm.pdfIn PDF document text
    • http://salonhq.xyz/getty_images_freehcixu.pdfIn PDF document text
    • http://theharaka.online/what_are_the_parts_of_a_roof_called_ukz45w6.pdfIn PDF document text
    • http://natlab.ru/global_competitiveness_report_world_economic_forum_2015fv2ka.pdfIn PDF document text
    • http://homearfes.com/44969525156isftg.pdfIn PDF document text
    • http://bigowet.xyz/fukitobutumewofpj856.pdfIn PDF document text
    • http://digitalmedialit.com/most_effective_cover_letter_templateyyfpo.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/rawesaragegugar/58637254776.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/aditi_singh_sharma_photo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/403f71e7-e912-474b-a8e6-81986c924d11/zeriguvi.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/1390297056.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/lowexuluxebadexata.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/17769106160.pdfIn PDF document text
    • https://0ccb9a81-bd3c-41bd-bc79-2352350f0e5e.filesusr.com/ugd/95ea6b_52986d9d7f394d05b7aae1d00d81a818.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb98fcb4-1197-4f78-b5d0-1561315edd97/50178301185.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/vekuluzewujaxapojevenen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9a1bf2-207f-4778-8f52-c6b01fc55d6e/digital_signal_processing_book.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/7211013872.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/voponemu.pdfIn PDF document text
    • https://9a9c460d-1cca-40b0-aaa8-67a875e606f2.filesusr.com/ugd/3b0c81_0017a04d46d94924b56cf8e37e71bb96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/celebrity_quiz_game_answers_level_1.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/22634878080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff6f4ce-386a-4508-9725-eab9697a77d9/pojutexulituw.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_off0000f8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A7 5380 bytes
SHA-256: ae67ba29144e8daa7cea4e12d1e1e3b47a99c0faa94370fc0039c0f29af04c92
font_01_sfnt_off00010ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD4 10228 bytes
SHA-256: 8c8d347ba86ddd92f79af1369f4387dc400e5040bc0a76e2ab536b18f7a00534

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