Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb55b0502ff847e…

MALICIOUS

PDF

85.0 KB Created: 2021-03-30 19:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9ab998bf956e591459d41862bf7e3963 SHA-1: 983e0901d8b846ad51ed149f22a232f77744108d SHA-256: 3fb55b0502ff847e776e09a5d5f6edfd12ac39db80f5647bb4571bf09561538b
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 0.9998

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://zajinet.ru/123?utm_term=pdf+digitalni+marketing PDF link annotation
    • http://hopecommunitynaz.com/95234166691rtoa0.pdfIn PDF document text
    • http://the-english-temple.com/30359833047cza81.pdfIn PDF document text
    • http://totalcreditreport.info/917383737207xcg5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402737/normal_60007e5c6506e.pdfIn PDF document text
    • http://soldonlakewood.com/zonoperorobekezyj3i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451047/normal_5fffcade5de11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450354/normal_5feeb5bec19de.pdfIn PDF document text
    • http://santand-es.com/flight_simulator_2020_xbox_one_console6qq2o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_6051661f58139.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_e51c1a91cb3b4a0a978aad9e4c16e8ea.pdf?index=trueIn PDF document text
    • http://kafalemanam.epizy.com/nanostation_m2_firmware_5.5.6_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/73736057451.pdfIn PDF document text
    • http://judomoposigu.rf.gd/9-_4_compositions_of_transformations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/tascam_2488_mkii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/how_do_i_reset_my_casio_cash_register_pcr_t500.pdfIn PDF document text
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_bc09ee0d289745e28837afe0b2f884cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/games_to_play_without_equipment_for_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/pifadabidagaj.pdfIn PDF document text
    • http://guligakifiw.epizy.com/design_in_architecture.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0A 5116 bytes
SHA-256: 92958c9160f1c80c7f22cf10a343adb4bea7250d674c95806ceb108533515bf5
font_01_sfnt_off00012063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12063 11400 bytes
SHA-256: c059a4112f77b9330433530580a14f510be29c8e3cdb371464526d68ae52c4d1

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