Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d81b17020475455…

MALICIOUS

PDF

63.9 KB Created: 2021-04-29 17:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 80958a3836ff55ef3512a40165cfea95 SHA-1: 2ee6399545371b8d647125dcfb8b9d82a18dc14f SHA-256: 3d81b170204754553b201f2b99dfbda867f73bb5af71b1dd731102fd1077f67d
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.5630

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.
  • 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://xajibur.ru/strik?utm_term=how+can+i+cancel+my+rental+agreement PDF link annotation
    • https://zosagejezigim.weebly.com/uploads/1/3/4/7/134709887/wamitikapoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/detatakev/2iggjih/kumosiniluzelamixixojowa.pdfIn PDF document text
    • https://mikixobitesa.weebly.com/uploads/1/3/0/7/130776626/6772191.pdfIn PDF document text
    • https://dejaxunex.weebly.com/uploads/1/3/4/3/134318563/lopojajovalin.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/hwKicgj/gods_of_olympus_names_and_powers.pdfIn PDF document text
    • https://tupusedaluniji.weebly.com/uploads/1/3/0/7/130738871/wonopad-gokozosig.pdfIn PDF document text
    • https://cdn.sqhk.co/jivumigen/bhfiijg/employment_forms_ontario.pdfIn PDF document text
    • https://dixaxotobaba.weebly.com/uploads/1/3/4/3/134377978/24a5f4e83b05.pdfIn PDF document text
    • https://larojebuwovu.weebly.com/uploads/1/3/1/3/131382373/2157851.pdfIn PDF document text
    • https://cdn.sqhk.co/wizokawoxo/iiJhhbO/79990736113.pdfIn PDF document text
    • https://lopatitegadusi.weebly.com/uploads/1/3/5/3/135311006/laxagisodalev.pdfIn PDF document text
    • https://xovuxajewilim.weebly.com/uploads/1/3/0/7/130775567/c41e194084d8.pdfIn PDF document text
    • https://gitufigekuxos.weebly.com/uploads/1/3/4/6/134634758/3ab8f73b99.pdfIn PDF document text
    • https://sokifavobal.weebly.com/uploads/1/3/4/5/134514189/9778054.pdfIn PDF document text
    • https://xulewanexu.weebly.com/uploads/1/3/4/1/134108589/winuvomowipijis.pdfIn PDF document text
    • https://cdn.sqhk.co/nazujovo/c3jjshe/jikibexezakux.pdfIn PDF document text
    • https://renudufodajofi.weebly.com/uploads/1/3/4/8/134884992/190d7af.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/xizakuzimuge_bowaweneb_xujuj.pdfIn PDF document text
    • https://bedaruwi.weebly.com/uploads/1/3/5/3/135326402/26fcaee649.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/kubafezin/66149167127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf33ce2-7acd-4c0b-9013-91503c580469/gatom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb355e4c-c044-4cd3-b09d-3e2a5290bbec/is_6_qt_kitchenaid_mixer_too_big.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/about_me_template_html.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/how_to_use_a_rival_18_quart_roaster_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/breast_cancer_research_and_treatment_submission_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/the_selection_coming_to_netflix_casting_call.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 5096 bytes
SHA-256: a01a46b66729683d6660519f831a65f38ff5aa6bfa041a2374128782d8b1ff15

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