Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab67b7393cbdcf3…

MALICIOUS

PDF

108.3 KB Created: 2021-03-17 07:26:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e10bb2ff5f0f314ac3046c64b47aeb91 SHA-1: 107954021045836074492d9afcf90c10b8298407 SHA-256: aab67b7393cbdcf37edc678c1146730f1ab7a565e10377a68f95a8e6b8f492d0
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 0.9993

Heuristics 6

  • 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.
  • 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://crophysi.ru/wix?keyword=affidavit+of+truth+right+to+travel PDF link annotation
    • http://rijexofugovu.medianewsonline.com/casio_protrek_watch_set_time.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/lodaluwerevafixawebu.pdfIn PDF document text
    • https://xaxomawiso.weebly.com/uploads/1/3/5/3/135329970/233265.pdfIn PDF document text
    • https://tufafoselebore.weebly.com/uploads/1/3/5/3/135389740/getetugil_pazib_gabojoluwukik_rolik.pdfIn PDF document text
    • http://lajafago.medianewsonline.com/artimanhas_da_excluso.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/1226736.pdfIn PDF document text
    • https://wujatukeki.weebly.com/uploads/1/3/1/8/131856991/3868759.pdfIn PDF document text
    • https://xuzumuja.weebly.com/uploads/1/3/1/6/131636792/tilefelarot-jorovako-pozopuwajiva-jokilagar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e043c79-3501-4f49-b8b3-4030a2f689dd/zodusifefuwolel.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/48424773436.pdfIn PDF document text
    • http://girofili.myartsonline.com/98274420870.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/performance_appraisal_l_g.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a3a5cd6-fd11-4a97-94f1-f537b39fe407/61630101133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7796d0e-e5d9-47ab-8e95-5c324d5aaa70/breville_toaster_oven_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9ba94f-23b9-4596-9ea1-929e18b7f169/polanyi_m._1958_personal_knowledge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b92b0e-38a6-45d2-8fd3-308dd31f0c41/20407593136.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/premiere_pro_transitions_free.pdfIn PDF document text
    • http://tameladizikep.atwebpages.com/vokugexaxijuvelazomepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393d16f1-fde6-4cd5-9210-16b231075069/solving_quadratic_equations_using_the_quadratic_formula_worksheet_algebra_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f45c4a2-cd3b-4e9f-879e-804cbe945204/38795909373.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/tabla_de_conversion_de_centimetros_a_pies_y_pulgadas.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/welerogunatibedikudokiza.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/hp_15_notebook_pc_bluetooth_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/854d24ec-2103-4bc6-898e-4af03897bc26/midland_75-822_dash_mount.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_off00015695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15695 5040 bytes
SHA-256: e3fbef633ac7e0131cd6e50a346633634dc2ccbba72985cb6d5ce6001a6b2a6a
font_01_sfnt_off000167c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167C4 11372 bytes
SHA-256: ed7419d130160ef6579b4822674eec7bdca663f3fce9c1c9adfc22465e82e49a
font_02_sfnt_off00018e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E42 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501