Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e4aed74caa6c1e…

MALICIOUS

PDF

79.5 KB Created: 2021-04-20 21:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6cfc0e20699488dd8acd6cd05c75045a SHA-1: 20d44ab5c472d43373491f05452851eaac11349c SHA-256: 82e4aed74caa6c1e9cb5162cfb865d57d09ae95ac0c377d75f29d3da45098514
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to Xfinity TV remote app issues, directing users to a suspicious URL. The presence of a large number of external links, many hosted on disposable domains, indicates a link farm designed for SEO manipulation or phishing. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/strik?utm_term=xfinity+tv+remote+app+stopped+working PDF link annotation
    • http://zukirudon.mypressonline.com/how_to_add_calories_to_keto_diet.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/92635755514.pdfIn PDF document text
    • https://miletotafog.weebly.com/uploads/1/3/4/7/134758503/7670985.pdfIn PDF document text
    • https://sopaxibifezubin.weebly.com/uploads/1/3/4/6/134608036/616919.pdfIn PDF document text
    • https://masejufubalabej.weebly.com/uploads/1/3/4/3/134388341/jilifudawadus.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/mario_benedetti_biografia_para_encontrarme.pdfIn PDF document text
    • https://wefuguveriviwex.weebly.com/uploads/1/3/4/8/134873390/d1e64139f20b5b6.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/hill_rom_bed_alarm.pdfIn PDF document text
    • http://lojuxaga.mywebcommunity.org/lorigituwemowewowajatame.pdfIn PDF document text
    • https://xuvelufuxilo.weebly.com/uploads/1/3/5/3/135387868/mitetalipazov_vijiterodumugux_lizuwoka.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/norcold_rv_refrigerator_controls.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/wadarojo.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/book_series_me_before_you.pdfIn PDF document text
    • http://begimewabifax.getenjoyment.net/77923589062.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/xijilesuzuxo/92462946428.pdfIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_9f362a361fd3485584822175f9599048.pdf?index=trueIn PDF document text
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_0c8ef7c3491348ea99c2871f2fcaa0d0.pdf?index=trueIn PDF document text
    • http://zonurupadul.atwebpages.com/lagotuvaburuwosomifit.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/agneepath_movie_123mkv.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/3827117231.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/tepenudanoma.pdfIn PDF document text
    • http://gulagopafed.onlinewebshop.net/after_sales_service.pdfIn PDF document text
    • https://f2182bdb-ca8e-4fe7-b379-f84e14eeb57e.filesusr.com/ugd/026bcc_3e2a19720f58475cbb0d0400e55687e2.pdf?index=trueIn 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_off0000f713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF713 5624 bytes
SHA-256: 5017ed80f1b1d3a11e865ff671c7093beeef12dfe65017aee0a149c2fedcfb22
font_01_sfnt_off00010a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A45 10608 bytes
SHA-256: 8a8e8e658ae12fdaaaea639df4551dee76406b7822f1789510bf372dd740ef9c