Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78925c4650b3fe8…

MALICIOUS

PDF

75.0 KB Created: 2021-02-12 13:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 68b3f4f240d98b571ee672be13c1676d SHA-1: 548c56c5a1ea4d0abc95c7cf3c211f3d490dff13 SHA-256: d78925c4650b3fe85064b778dcbd5a2f287d3710fc464889a4f916154759d2e5
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-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.
  • 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://crophysi.ru/123?utm_term=can+you+cash+in+your+birth+certificate PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451549/normal_6022081a0f431.pdfIn PDF document text
    • https://ginugifugebiner.weebly.com/uploads/1/3/4/2/134234672/fobep.pdfIn PDF document text
    • http://pixell.store/zifosiwuledenaxewavusod5tr68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376086/normal_5fe0fccd36a1a.pdfIn PDF document text
    • http://supermagazforsale1.xyz/dunonapafeteledonela3s1em.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502175/normal_5fc61c742ccfb.pdfIn PDF document text
    • http://devgm.design/dungeons_2_demon_guidewhc2x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455639/normal_5ffea3fb4e3d3.pdfIn PDF document text
    • http://storeplus.pro/puissance_moteur_lombardini_im_350hp9x9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kidagemomosate.epizy.com/california_king_wood_platform_bed_frame.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/32522088343.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/crash_bandicoot_warped_emulator.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/clinical_practice_guidelines_diabetes.pdfIn PDF document text
    • http://nezopodadas.epizy.com/ingres_database_administrator_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/christmas_music_clarinet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/microsoft_office_word_graph_paper_template.pdfIn PDF document text
    • http://suvokejixu.epizy.com/23230703320.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_off0000e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 5084 bytes
SHA-256: 2d177e56300cbc6ba8883b7e6b077c017af5a1b2abb9ca9c7b867a7779cc5ddc
font_01_sfnt_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 11488 bytes
SHA-256: 60da739f53c1a15551739361ddc41a40f8b8ca0a2ec8aa1619a0901b2ea3f65d

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