Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4152c80a4cc850…

MALICIOUS

PDF

75.9 KB Created: 2021-03-18 10:28:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fc6f5f541274169ddfe2deccf61db2c4 SHA-1: 04b0e4629a7c14be8a2bcfb84f588bb1c025fe0e SHA-256: dd4152c80a4cc8505b7b7ec7d04655770bee989f3836b0c28cdecd09de120a25
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to 'personal trainer study guide pdf'. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=personal+trainer+study+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/kukojuvata/B3iiR3y/oceanhorn_2_switch_metacritic.pdfIn PDF document text
    • https://nurokavemi.weebly.com/uploads/1/3/5/3/135347840/9767974.pdfIn PDF document text
    • http://detozube.scienceontheweb.net/cevisa_chp_12.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/2jif6hj/kakewajelodavu.pdfIn PDF document text
    • https://guxiwuwo.weebly.com/uploads/1/3/1/0/131070036/petiwijow.pdfIn PDF document text
    • https://cdn.sqhk.co/naxenunovus/ijwTGjh/read_music_notes_violin.pdfIn PDF document text
    • http://datiwufirul.medianewsonline.com/73706590772.pdfIn PDF document text
    • http://lirudizulizi.iblogger.org/ministers_black_veil_theme.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/52377680040.pdfIn PDF document text
    • https://cdn.sqhk.co/nepodowu/viiuifo/cppdroid_c_c_ide_apk_download.pdfIn PDF document text
    • https://benuwefijazom.weebly.com/uploads/1/3/4/8/134897428/9985799.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_6db14945cf404d00b1954a67422cb59f.pdf?index=trueIn PDF document text
    • http://pojisugafini.epizy.com/dowanisizidaxamemevuvapo.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_da1ef7f27d3a47bba7546d6766f1f7ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/nawozaderafumepirekamaban.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_6f6045aaf6234cb6843fa034a41c2bb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kevava/aleister_crowley_livros_em.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/whats_the_coldest_city_in_the_united_states_today.pdfIn PDF document text
    • http://kakoxiji.rf.gd/do_you_capitalize_the_first_word_in_quotation_marks.pdfIn PDF document text
    • https://43fe4710-460a-4ad3-90dc-2dd795c51528.filesusr.com/ugd/a32c20_96f2d76e0d2d4af3a5357add2fcb83cc.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_off0000eb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB19 5312 bytes
SHA-256: 659a582c27b79fedd585670dc1adb568694316dca3ca16f7edaee8cef8098be2
font_01_sfnt_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 10860 bytes
SHA-256: ac26bc2115e00ab398e8a34f3f3f4b7afe7784e2fe410d82f05f31b0067abdf4

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