Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e002683637716d…

MALICIOUS

PDF

76.6 KB Created: 2021-05-02 06:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 66d0fb04bfd864432ce765d4ad847d0f SHA-1: b0750d585e11c182a3cee7b8dcad6941ec3443f6 SHA-256: 42e002683637716da9499547ce2b85e56ff756847a124d608de23ac4a549813a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or redirection infrastructure. The document body, though heavily obfuscated, contains a reference to 'xfinity cloud dvr', indicating a potential lure for phishing or scam purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=how+to+get+xfinity+cloud+dvr PDF link annotation
    • http://smm-target.ru/giwufojexavdlfn7.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/GgeIhhF/55371627819.pdfIn PDF document text
    • https://cdn.sqhk.co/mawejoxejobe/iBryoic/craigslist_atlanta_apartments_no_credit_check.pdfIn PDF document text
    • http://form-copyrightservices.com/la_fenomenologia_del_espiritu_gratiswpga1.pdfIn PDF document text
    • http://opit.space/34540033387fw28g.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/gjdjbhc/58297067304.pdfIn PDF document text
    • http://anarchymedya.com/what_is_the_other_word_for_sensory_neuronkwcsb.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/12764086351tqffo.pdfIn PDF document text
    • https://cdn.sqhk.co/jegisizozul/mibigjr/bloomberg_new_energy_finance_report_2016.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3a4fa0-0793-4e65-bc85-f5905defd0cd/lejakazij.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/eliot_goldfinger_human_anatomy_for_artists_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c85f003e-2d98-4f0e-a462-61bc67afef56/how_to_install_kicker_hideaway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcec1884-183b-49c2-ac3c-fd311384c04a/news_report_examples_for_students.pdfIn PDF document text
    • http://wunorewotiv.epizy.com/analog_to_digital_converter_ic.pdfIn PDF document text
    • http://lojifasipok.rf.gd/kojiruxep.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/48697691646.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/kolevogaxilelex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deecfabf-b8c8-417d-925d-e4d6d80d4f2a/metaphysical_meaning_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/64360634641.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/learn_english_language_free.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_off0000f0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E2 5084 bytes
SHA-256: 16ad54cbbead94cdb5f2a804046bf4ebe178c3b5a449a8974d94b15d4c2e1a0e
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 10232 bytes
SHA-256: f169cf73d14a0f9034a7fd2ec6a5e7d34a9e7a7e43df7541543b1a89e267ddd4

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