Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4674a526fe47a0…

MALICIOUS

PDF

72.3 KB Created: 2021-05-19 05:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dc816cd519a6913c4c3e2c8b6e8161ee SHA-1: c9061c9ef0aec3cec9b84bdf742de430577f4e72 SHA-256: df4674a526fe47a0307f0342d56750eacd9f933d8c63dff5f06aadff3b51b9f2
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 0.8231

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://fokemale.ru/strik?utm_term=alora+sealord+confraternity+songs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407562/normal_5fd3c96059fba.pdfIn PDF document text
    • https://topukutenikoxi.weebly.com/uploads/1/3/4/6/134668920/dorejojifan-lobisa.pdfIn PDF document text
    • https://ledimame.weebly.com/uploads/1/3/5/3/135306483/9e51889a3b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408335/normal_5fe8efcf8626e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488804/normal_601b369b5dd50.pdfIn PDF document text
    • https://firunonosud.weebly.com/uploads/1/3/6/0/136052948/wapurenolebij-dumikafonaze-befimuvemituw-tegugenebovumat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407304/normal_5ffc9ca4968da.pdfIn PDF document text
    • https://segagewemavovus.weebly.com/uploads/1/3/0/8/130874565/seliwut_pidipexo_jagedotuseji_diwaxupiwul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fe83f403b73a.pdfIn PDF document text
    • http://vadigoz.iblogger.org/how_to_put_baby_in_ergo_forward_facing.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/9650154.pdfIn PDF document text
    • https://natedutaz.weebly.com/uploads/1/3/4/8/134850225/8577737.pdfIn PDF document text
    • https://numesenara.weebly.com/uploads/1/3/1/0/131069843/1658695.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/pizivurapab/bosch_obd_1000_price.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/3136395126.pdfIn PDF document text
    • http://vawutalakomu.epizy.com/wosuxedare.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/formation_assistant_de_direction_alternance.pdfIn PDF document text
    • http://gamojeliziri.rf.gd/48759388830.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/82819325563.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/molecule_polarity_phet_lab_worksheet_answer_key.pdfIn 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_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 5180 bytes
SHA-256: bb6d97577699d48740a5bffb28fc1d1a7d108eb517b652899b5b9ee930821058
font_01_sfnt_off00010fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDE 5280 bytes
SHA-256: d9897d241429d88c277f33ab574e30ba4e23dafc314456ac22b7e1efb3270934

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