Malicious PDF — malware analysis report

Static analysis result for SHA-256 2679c248a616b9da…

MALICIOUS

PDF

90.2 KB Created: 2021-01-08 09:28:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c626648ab5f1a89b4392cf555ff0b350 SHA-1: 5a217bc7952888806def88b38f6f201188133066 SHA-256: 2679c248a616b9daf6d3c3a73dfd04504c6d19028b7f2a838af85cb3655e789a
156 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. 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 0.9993

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.
  • 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://trafffi.ru/123?utm_term=rules+of+block+diagram+reduction+techniques+ppt PDF link annotation
    • https://semezuzuxikazug.weebly.com/uploads/1/3/4/2/134234688/nalaloxexe.pdfIn PDF document text
    • https://dodoluwateja.weebly.com/uploads/1/3/1/3/131381806/5523579.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/juxebezojivo.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/55894233924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/270d09e0-719d-40aa-9ec5-2eac7f801396/alphabet_number_code.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/japafedosa.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/dashboard_templates_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/jenuzobamoronotadosagifij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/417a8c15-2234-4f5f-a638-cc4f819d0d8d/79126503433.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/bc_forged_wheels_na.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b37f682-6b45-49c9-bd7e-0b059ce110ef/simmons_truplex_riflescope_3-9x50_matte_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d35c5b-c5d4-4d74-9db9-4fe7d353c4cc/best_pickaxe_enchantments_minecraft_dungeons.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/march2success_asvab_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9987cfaa-090c-4163-89b2-f09ee56e16a2/badger_hole_sd.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/2006_arctic_cat_400_4x4_atv_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70dfb85-6064-479f-875d-3df98ad3b7d4/gifomisenod.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00012bfb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12BFB 25876 bytes
SHA-256: 783a5c9bef7050623f623949c8e1749c7d62cf8a3c1dd0b408a4fb5a07c8b012
font_00_sfnt_off0000df61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 3012 bytes
SHA-256: a5f9277e3a32d85f03268a27eed58614062706f15eb214a454dd21228b9e9846
font_01_sfnt_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 1540 bytes
SHA-256: 31bee2621b52a9f1c9fe974cbc2c0705b41244215bf7760711c071051a26170f
font_02_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 5908 bytes
SHA-256: be309ca74aa7964183f55631eec8314e69501ba54ae023994c04d256bbd4bbcd
font_03_sfnt_off000105ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EC 11040 bytes
SHA-256: a04e024ccc8ac4b5dca302ce80c66940c0e3a7488d129045b633c081702ee4f7

Open this report in the interactive analyzer, or submit your own file for analysis.