Malicious PDF — malware analysis report

Static analysis result for SHA-256 6576eaa103fad3e9…

MALICIOUS

PDF

69.6 KB Created: 2021-03-10 17:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 71814f5afba1f81309f15ad2f401e5c0 SHA-1: 37cae114d78546ab1690e0d90fe7f5cef1c1597b SHA-256: 6576eaa103fad3e9039eb01c12e9d3a3ab514369c01df0cd9ecc084b483b6ab0
186 Risk Score

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 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/wix?keyword=crossmatics+puzzle+8+answer+key PDF link annotation
    • https://nevozijefase.weebly.com/uploads/1/3/4/7/134748823/vuvaduvidodosa.pdfIn PDF document text
    • http://jarowulizose.sportsontheweb.net/converter_into_word_file.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/512680.pdfIn PDF document text
    • http://fejiximodanu.mygamesonline.org/how_much_are_old_marvel_trading_cards_worth.pdfIn PDF document text
    • https://gilemana.weebly.com/uploads/1/3/5/3/135319463/mekivevosoge.pdfIn PDF document text
    • https://dijitisabotiji.weebly.com/uploads/1/3/5/3/135324222/rifuwedudilarorewis.pdfIn PDF document text
    • https://bujasosepamus.weebly.com/uploads/1/3/4/6/134626994/13603.pdfIn PDF document text
    • https://gumakamatiz.weebly.com/uploads/1/3/4/6/134600955/zuvexi-budobuzujiwa-lelaz.pdfIn PDF document text
    • https://tizezesi.weebly.com/uploads/1/3/4/0/134041120/66859bd0960056.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/xowaruvusufesomefune.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/the_vampire_diaries_painting.pdfIn PDF document text
    • https://foreguguwikib.weebly.com/uploads/1/3/0/7/130775698/toxinavugav.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/phonics_worksheet_for_kindergarten.pdfIn PDF document text
    • http://vujuxivawopigu.22web.org/92018683185.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/gefozarirefijonataguka.pdfIn PDF document text
    • http://susabumo.atwebpages.com/80427300442.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/3ds_emulator_android_apkmania.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/himno_del_maestro_venezolano.pdfIn PDF document text
    • http://dolasuwukino.epizy.com/chicken_invaders_6_free_for_pc.pdfIn PDF document text
    • http://rijejonusax.rf.gd/tulifugi.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_off0000d56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 5484 bytes
SHA-256: c2433ac88bbb8f42ad7ab7e6e72b34adcf844e0a4185ac8e5f9b9e0b6c3a11f6
font_01_sfnt_off0000e817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE817 9736 bytes
SHA-256: bfa4cccdfee2ad26cb18fb39dc61713b2be0c6ade0dcf4233e0d5d4582f3ab0d

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