Malicious PDF — malware analysis report

Static analysis result for SHA-256 7619af5fa3124899…

MALICIOUS

PDF

72.7 KB Created: 2020-11-19 23:06:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ba44bddad87753cd2f055d6c4fbf0dc7 SHA-1: d4e3d9a5be5389200c8694b2f75e4592fcf2b956 SHA-256: 7619af5fa3124899b24c82303690aa363b60bcfae18339efab9de24f2734a8a7
196 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. It uses a password-protected-archive lure. 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 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://trafffe.ru/123?utm_term=empires+and+puzzles+android+hack PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466151/normal_5fae6ce6bfae0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f923f9fd7ee0.pdfIn PDF document text
    • https://dipedupaketi.weebly.com/uploads/1/3/4/3/134333799/7373243.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c1805661-adbf-496c-82e1-3537e44e7a2f/josh_jones_crappie_guide_ok.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/general_anesthesia_medicinal_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/ielts_writing_task_1_and_2_answer_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c43412-adcb-4b09-b47e-3fa501a70773/37321170641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b2c3172-d857-4c81-bc88-717327d8182a/lulupipupawikuwulafef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b0185f1-8eda-43d7-9546-20054a370903/dear_ann_landers_archives.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47db8846-58fe-461b-a73c-d1573a70c2b7/6927053599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd6ae60-7ac0-4d27-b721-6051397aa4b3/majoras_mask_masks_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d39fdfab-7b42-4add-913d-a9c84b327572/wegivizibomutawetepofore.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD196 5184 bytes
SHA-256: 8c2a76d1b2997cc5a4d7f7401a8528b62242d49c651a76067f028919431185a7
font_01_sfnt_off0000e2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FE 11096 bytes
SHA-256: 0e6e85ae16e125a5c8c47b91838b286c21a1cf59aa11b208f1c9dafc026bacc7
font_02_sfnt_off00010806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10806 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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