Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd32d572afaf7ae5…

MALICIOUS

PDF

84.4 KB Created: 2021-03-28 06:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7383500a946c7d11ad9be91828061e01 SHA-1: 7cb48894651479ba0006176ef9bc4d6c4685aacf SHA-256: dd32d572afaf7ae566ff08baadb4a6f110b182cd49d71fffc4d04d7e548278dc
194 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm designed to obscure malicious destinations. The 'Fake invoice / payment lure' heuristic suggests a phishing pretext. While no scripts were directly extracted, the PDF structure and numerous external URIs strongly suggest it's a distribution mechanism for further malicious content, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=emoji+2+answer+hulk PDF link annotation
    • https://cdn.sqhk.co/mekaxosur/yjfVjcG/join_clash_3d_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenelavup/HyjcicO/jubavikasodawol.pdfIn PDF document text
    • https://revijokatise.weebly.com/uploads/1/3/3/9/133999222/potode_bupenoxitiso_fosuwoxoxub_femed.pdfIn PDF document text
    • https://gukofatupov.weebly.com/uploads/1/3/1/0/131070505/b5a79012a3038.pdfIn PDF document text
    • https://sekitajed.weebly.com/uploads/1/3/1/3/131383533/gojobonirogaliv.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/kawinupoxovurafuz.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/canon_speedlite_430ex_iii-rt.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/69928200958.pdfIn PDF document text
    • https://jevoweli.weebly.com/uploads/1/3/5/9/135958856/4849438.pdfIn PDF document text
    • http://devigebogubiret.getenjoyment.net/48465620392.pdfIn PDF document text
    • http://vevebopawo.mywebcommunity.org/30476012078.pdfIn PDF document text
    • http://rogevunesopu.medianewsonline.com/how_many_electrons_are_in_the_4d_orbitals_of_the.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/6605cd27.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/sefixox-mexisumodemugaj-zowozakuniz-buxel.pdfIn PDF document text
    • https://fubabogi.weebly.com/uploads/1/3/4/6/134617409/buxilusatowotadoran.pdfIn PDF document text
    • https://kevafesituwa.weebly.com/uploads/1/3/4/0/134040773/nebinipiw_kimabadinumome.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/boviwufemafoje-kanumonunulaku.pdfIn PDF document text
    • https://sinitilelimokiz.weebly.com/uploads/1/3/4/3/134348988/6341922.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mujebik.atwebpages.com/fugapixamedemewegomakuvi.pdfIn PDF document text
    • http://mugomodag.atwebpages.com/advantages_of_african_continental_free_trade_area.pdfIn PDF document text
    • http://vipuzala.myartsonline.com/airtel_payment_receipt_download.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF702 3656 bytes
SHA-256: 38ca959a22c9978af7e49d0681804bb33f4a8f710dd24fa00d6267caade7c070
font_01_sfnt_off00010416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10416 5248 bytes
SHA-256: 43e1a48a35d0bd3682af01da12e3672837f15def363df3feb369fde10d1ca989
font_02_sfnt_off000115c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C8 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off00011e56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E56 10916 bytes
SHA-256: 66c780056152b827c02d76a7d11c724bc310a96df8e6462da94c28aeb9ef9fae

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