Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d7f86122449407…

MALICIOUS

PDF

121.7 KB Created: 2021-04-03 16:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3025094fff47171968ba54587bd57d07 SHA-1: 559eb7e8f1d05619dfc4542d56b4fdfe9cec9f11 SHA-256: 71d7f86122449407e6a36aafabf7401ebd1932ee5847ab61158f62780ed87729
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with one specifically identified as part of a link farm designed for SEO manipulation or hosting potentially harmful content. The presence of external URIs and the overall structure suggest it's intended to redirect users to malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=bitmoji+apk+2020 PDF link annotation
    • https://soseriwu.weebly.com/uploads/1/3/4/8/134898980/2922916.pdfIn PDF document text
    • https://loxigiberojawi.weebly.com/uploads/1/3/4/7/134770663/7aa4c1adf33.pdfIn PDF document text
    • http://fogepadive.iblogger.org/12491144646.pdfIn PDF document text
    • http://peluxuba.sportsontheweb.net/xutepimejarovujekalunajud.pdfIn PDF document text
    • http://rupazaduxil.mywebcommunity.org/extraction_of_actinides.pdfIn PDF document text
    • https://zikixitifo.weebly.com/uploads/1/3/4/8/134897390/vegibu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480886/normal_5ffc91727a816.pdfIn PDF document text
    • https://sojagifuwolu.weebly.com/uploads/1/3/4/6/134689160/pemedena.pdfIn PDF document text
    • http://lebofawudire.mygamesonline.org/psychology_questions_and_answers_in_tamil_download.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/zuzerejukowidafirid.pdfIn PDF document text
    • http://waragofekoxexaz.sportsontheweb.net/10th_class_biology_textbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417208/normal_600dce17c994b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_602527c5d5906.pdfIn PDF document text
    • http://fexuvukenix.22web.org/polk_psw505_specifications.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_602c5ad33ffa2.pdfIn PDF document text
    • https://funoridarudaru.weebly.com/uploads/1/3/5/3/135304061/gedomupigaxix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gixiluvigatekij.atwebpages.com/68470410780.pdfIn PDF document text
    • http://lemijafuw.epizy.com/79855898760.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/manualidades_botellas_decoradas_con_fotos.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/1280_x_12.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/ninofafuwogadoxogikinese.pdfIn PDF document text
    • http://gubadif.myartsonline.com/best_wireless_communication_standard.pdfIn PDF document text
    • http://limuzer.atwebpages.com/batman_arkham_asylum_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/blockchain_python_tutorial_github.pdfIn PDF document text
    • http://gunuguduwurenog.epizy.com/gudabasawenosogikugirimek.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_off0000fb3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3A 51124 bytes
SHA-256: 1a0c712b8ba3b1f8b72d6764e5ce0cb9432dc872223e8bcc83d3348e912dc0db
font_01_sfnt_off00019640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19640 4684 bytes
SHA-256: 2b7bb038f453bd84301674d772ea514e7242ccd312e4628faeafb1b53ec0b9d8
font_02_sfnt_off0001a628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A628 10000 bytes
SHA-256: d31ae50efe8c0cf3cc2c4dd3295097820fc08c79a5d741d75fedf061900fb015
font_03_sfnt_off0001c87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C87A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c