Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2260aad9df7352…

MALICIOUS

PDF

69.3 KB Created: 2021-03-28 01:07:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8ec245f25f8b494c383c612bec6b1a79 SHA-1: df422268cfe3825ff5b1ead53784240dd61067f3 SHA-256: 7e2260aad9df73529bcf9011c1c34209dd96d621635131c7dc16e5334684920c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body's deceptive title about mail merge further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7937

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.
  • 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
  • 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://golowaki.ru/award?keyword=how+to+attach+pdf+file+in+word+mail+merge PDF link annotation
    • http://xeratigike.medianewsonline.com/bangkok_bts_map_2020.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/jafoforosuxuferikexe.pdfIn PDF document text
    • https://rigefenasoje.weebly.com/uploads/1/3/0/7/130776330/razitida_tofiginoxa_wurila.pdfIn PDF document text
    • http://bokaxakoz.sportsontheweb.net/puzudonobevuvetemabe.pdfIn PDF document text
    • https://gexamefirizawem.weebly.com/uploads/1/3/4/6/134668325/winulosalosazuve.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/matanoteluk.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/wogikokuzotaxa/32087951732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c229ec-b430-4d3a-910f-51f8a4e81609/9356646962.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/administration_job_titles_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6ee932-5349-486b-93fe-38d9551e2605/mugolamuzop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce9bcc92-2c1c-49c9-b907-36e6cc06fb03/download_ti_nspire_cx_cas_student_software_full_version.pdfIn PDF document text
    • https://ca4714f6-1050-42bc-a227-6c2105fd3203.filesusr.com/ugd/c345b0_33a0b7f2d1d7423b880648dc0868911c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/jokimerevoluvoramebonulak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddaa3398-2fe4-4e4e-8ca1-ecd4b043c85e/ideapad_y510p_ram_upgrade.pdfIn PDF document text
    • https://f904ef53-caa1-4f0f-8a97-c50675c03ece.filesusr.com/ugd/2f8cea_1c8de0c477324d468b4dbd80586a7728.pdf?index=trueIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_384c504ee7a444319b65659e4391913b.pdf?index=trueIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_096bae217dc04c469920e643101890f6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadere/advanced_mathematics_precalculus_book_answers.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_8b2f3934e9cd406897c2673c0a111691.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/my_talking_tom_apk_mod_mega.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_0fcc8d252a614e48aae86bb5eb518f13.pdf?index=trueIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_9210be9f91e54df0836fffc426fd7b1f.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFA 5444 bytes
SHA-256: 58ad1b13308d2c6472458d86a6aea1c8978ba9be6ebeda669179bc15702c2920

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