Malicious PDF — malware analysis report

Static analysis result for SHA-256 2371f90645002233…

MALICIOUS

PDF

74.6 KB Created: 2021-03-17 05:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8021ca8d39e8aebb5e91c47519f81d2c SHA-1: bb851664d6ae7f8693bd63dbba434cc08080dd99 SHA-256: 2371f90645002233387ef3815036f2851cd394399cc3fd1fac503774842e6079
194 Risk Score

Malware Insights

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

This PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=how+to+download+custom+tunes+on+sct+livewire PDF link annotation
    • http://niwuloxob.22web.org/meaning_of_application_software.pdfIn PDF document text
    • http://kojijeku.mygamesonline.org/a_storm_of_swords_chapter_51.pdfIn PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/7165023.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/waxigilagom.pdfIn PDF document text
    • http://normal-id.com/5_love_languages_for_child_quizryl1b.pdfIn PDF document text
    • http://akmurzina.com/is_spanish_the_sexiest_languageak75y.pdfIn PDF document text
    • http://kpupnov.pro/rpsc_2nd_grade_maths_bookyi159.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/duvekasidesafuragibufulo.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/vififu.pdfIn PDF document text
    • https://lizatupapej.weebly.com/uploads/1/3/4/4/134401074/voritekivoveka.pdfIn PDF document text
    • https://vasuwogi.weebly.com/uploads/1/3/4/0/134017955/5920048.pdfIn PDF document text
    • http://mananeje.66ghz.com/action_crackeado_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavevex.onlinewebshop.net/statistical_methods_ng_das.pdfIn PDF document text
    • https://5e3b32e6-a537-4a58-a531-ef303a468713.filesusr.com/ugd/120874_ae4e85b658134cf8885feb56ce0f62fc.pdf?index=trueIn PDF document text
    • https://7a512b58-7189-4bc4-8343-f643fa9054c9.filesusr.com/ugd/1e52da_197b4c807a45440ea7a11796c3519875.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/ethiopian_music_free_video.pdfIn PDF document text
    • http://sikamavidasatam.epizy.com/8537856957.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/application_x-_www-_form-_urlencoded_java_encode.pdfIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_747ee1c72e8149b8b31093992b5b906b.pdf?index=trueIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_ae66455c3c474889bcac081b8d43a49d.pdf?index=trueIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_0070de9d584d49ffbb1d893d04b0ae3e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/rifobopoleludila.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_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 5196 bytes
SHA-256: 9003891b7c2c8724f1f843f7218a32755beb30f978161f2827b6737eb5e214a5
font_01_sfnt_off0000f6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DE 11148 bytes
SHA-256: ab146232aa4409a86d86084388814a0ac55a88c19ebb9290f3aa34eb9b886890