Malicious PDF — malware analysis report

Static analysis result for SHA-256 01718b63312c81c0…

MALICIOUS

PDF

115.4 KB Created: 2021-03-24 01:10:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9f3bbfe571898d279d8d97ce2f5e1adb SHA-1: 12b042e3e2c6396fd9461befd3b8ff28de501f27 SHA-256: 01718b63312c81c01e7f3f22434561efa60e9edea91dc6cd355550211de50b71
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 0.9997

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=ffxiii+weapon+upgrade+guide PDF link annotation
    • http://lozuzaragujeb.mypressonline.com/european_arrest_warrant_template.pdfIn PDF document text
    • http://rosirodefi.iblogger.org/bafg_berlin_antrag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tufuripisaren.epizy.com/concatenate_in_rtf_template.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/types_of_performance_appraisal_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/sci_hub_sentinel.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/how_many_volumes_is_saga.pdfIn PDF document text
    • http://mezadurojixovi.epizy.com/14699069206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54d40950-53e4-465f-9971-9f7b7add2796/jebapifuja.pdfIn PDF document text
    • http://feluwagosipo.rf.gd/gilosiluwotupezojove.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/not_cinderella_s_type_imdb_parents_guide.pdfIn PDF document text
    • https://c18d7360-3707-4bf1-9d6f-52ba7510fa17.filesusr.com/ugd/76cb06_8b8d6e3f68ae4bc09256798e82c88f9d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/kuxutulasugonesijuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78a993f5-36bd-4c1a-9eac-d0dd93d30f3f/leses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac395fe-5dd8-4723-ad8b-07e911bc9ebe/sizen.pdfIn PDF document text
    • http://pukowevuvifa.rf.gd/how_to_get_ethical_hacking_certification.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_27ade7fe126f480bae38c6789d6321d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/23520432091.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000174ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174CE 5116 bytes
SHA-256: 86b4b581abb2057ac8d00e5a71a6259e7ae09a13dceb3dab7727cb0faee200c6
font_01_sfnt_off00018662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18662 10916 bytes
SHA-256: 73cfb72871bb30f88e450d802192ce30ae9fe9183afa1566e24ed41bd470b444
font_02_sfnt_off0001ab93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB93 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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