Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb9fcd53d38af2b…

MALICIOUS

PDF

91.7 KB Created: 2021-04-20 17:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e52d37fc8b69877f34329622af017ad2 SHA-1: b371cf2083005d0f5bdc7f609a2d1c6d5dc40496 SHA-256: cbb9fcd53d38af2b03be1597bda4f0506b759b56c35fd11c202fa1850d22289d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/strik?utm_term=zoom+g1on+patch+list PDF link annotation
    • http://kleomaften.online/1807336570ojbbo.pdfIn PDF document text
    • http://gsmall.space/kaxetefalavadivoderedmkmmy.pdfIn PDF document text
    • http://drovazvenigorod.ru/digupefintkhm5.pdfIn PDF document text
    • https://nawivavunof.weebly.com/uploads/1/3/4/6/134669961/b2ebcc995dde5.pdfIn PDF document text
    • http://ctyr.ru/lighthouse_point_yacht_club_townhomestj912.pdfIn PDF document text
    • https://livuwijonirib.weebly.com/uploads/1/3/4/7/134732661/gimeruzenilarumaside.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3bfdbf6-c394-42a3-9d86-af26c05253b7/aircraft_maintenance_engineer_license_malaysia.pdfIn PDF document text
    • https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_4d38113170f54035bd9ddc78c1446313.pdf?index=trueIn PDF document text
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_74593fb59961418095575bef6e88217e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c0f8be9-59ee-4763-8afe-53dd95bd5f72/27723217120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90a0056-f6ea-4a70-adac-84d25954faf6/beats_by_dr._dre_-_beats_solo3_wireless_headphones_black_friday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54540a26-7841-4c51-af1d-ad32a2a5fc42/42528775794.pdfIn PDF document text
    • http://bolesumedinix.rf.gd/kenmore_front_load_washer_not_draining_completely.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_7b6a55f4bd6340429958011908da7c55.pdf?index=trueIn PDF document text
    • http://xevikosurozogin.rf.gd/47741730082.pdfIn PDF document text
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_f7bf839f1f0c451a8bad0e4cf261daa6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09b07d1-c7cf-4953-ba1b-70a324feb840/the_hobbit_tamil_dubbed_movie_download_isaimini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fccd6cc-bc0f-4dd7-b973-ae5cc393c25c/vakuzesabajij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/726e94ba-63d4-4192-9a79-38ff5ce9e30c/kosatemubupetomu.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
    • 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_off00010f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F78 5260 bytes
SHA-256: 42c031f70426f11423d0783951edc7d2354cd3eadde652e5aa4f3447a3807236
font_01_sfnt_off00012148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12148 11888 bytes
SHA-256: ad051e646306bd79b7f915427db858d532002d78bfe054da3d76c45fbee39a41
font_02_sfnt_off000148f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F8 17028 bytes
SHA-256: 469b6e6752b3f5cf51fe5cb6154231f53efe79568fe0f761ea29a2b8e158d3e3

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