Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0290e7dd6d73857…

MALICIOUS

PDF

80.4 KB Created: 2021-03-08 17:15:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e2b9e52de1afea176082dc88fd49ad2e SHA-1: 5fa69199928424ae4af3e70a281b2561d23093d8 SHA-256: f0290e7dd6d738575be732562d655562e5558b01bbf1e9f3402438c256f21e5c
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 0.9998

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://dugedepap.ru/award?keyword=appassionata+3rd+movement+sheet+music+pdf PDF link annotation
    • https://lelebozo.weebly.com/uploads/1/3/4/5/134578107/7787195.pdfIn PDF document text
    • https://lefesime.weebly.com/uploads/1/3/4/8/134882546/6218787.pdfIn PDF document text
    • https://likufugusatu.weebly.com/uploads/1/3/1/4/131406708/paxajafowazumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_70713d8a9da8424eb6e6bd2da8820a00.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/meludav/20868411946.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/79598526636.pdfIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_4b025d94da5e43beb1331a00efe19219.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bcff72b-3e31-40a9-8858-8f0d282221c9/47848385092.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/wadedovupibevuduwa.pdfIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_13fd6bcdf6ed433280ac27381f5228c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/kelvinator_oven_manual.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_d8c5c009639248b78a7056d90288f2b4.pdf?index=trueIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_b62fcd01b7fc4d60a8ee2383e0ac2405.pdf?index=trueIn PDF document text
    • https://a39ac558-8fe8-437d-9e10-dc9402d6cb9c.filesusr.com/ugd/1ebe14_664609ad24cf470e882d64d297851e1f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e7883f-1aba-47d9-b2b9-cffabd2ee779/48103999259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e8d632d-695b-4eb5-beb7-abecc31f456d/youth_football_training_drills_youtube.pdfIn PDF document text
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_42f9c739b27d4d8890f659b05329b032.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/garorowa/android_sdk_version_28._0._3.pdfIn PDF document text
    • https://ede8a7a3-2377-4e09-926a-401222b31c25.filesusr.com/ugd/81c89d_b94c1347a9304ad2b8ca03dfb9ffa43a.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 5576 bytes
SHA-256: fc0e316305f99cf757b9d74649cc2fc86c1d81345e76146ea0aff239fc4e4d5b
font_01_sfnt_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 15880 bytes
SHA-256: e3fe761baadbc9f28b6000e0489bb6ccaf8a1777ef01bc1077c3fa26e047f714
font_02_sfnt_off00011cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC4 16168 bytes
SHA-256: f6ffcb8e98380a6a00898d067bd4d41b22df2476b84024e8913896af38ab8551

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