Malicious PDF — malware analysis report

Static analysis result for SHA-256 70331e25a1fffc60…

MALICIOUS

PDF

77.9 KB Created: 2021-04-23 19:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19b001b9671dcd4b9a53cef5624a4fe4 SHA-1: 2976ad988923e032859803dbef8f9b8fe08af53c SHA-256: 70331e25a1fffc60ccfd26e304cf0225fd68a2422d9fddc210a3eba9365d3eba
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a phishing or SEO spam campaign. The embedded URLs point to potentially malicious domains, and the document's structure is consistent with a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=how+much+is+honda+power+steering+fluid
    • http://goodshopsales.xyz/which_country_gives_the_most_foreign_aidgm5hw.pdf
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/gididivukifase.pdf
    • http://moymagazin.xyz/german_english_grammar_book_class_10cwp67.pdf
    • https://cdn.sqhk.co/divojimo/heTPjhl/huntington_mobile_banking_support.pdf
    • https://ramipataxeki.weebly.com/uploads/1/3/4/4/134483057/dewipuzaw.pdf
    • https://cdn.sqhk.co/samofetob/jjc5ie1/21892323706.pdf
    • https://cdn.sqhk.co/nuvexajamu/aN7Qgjd/bopebijosilejub.pdf
    • https://zotaboxobur.weebly.com/uploads/1/3/6/0/136091523/6912916.pdf
    • https://wuwotozon.weebly.com/uploads/1/3/4/3/134315251/jazadapabavinalivi.pdf
    • https://wowumufugijakig.weebly.com/uploads/1/3/0/9/130969685/rofuvoruzaku.pdf
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/0e952d0ee.pdf
    • http://vezugumak.22web.org/gidokewemaw.pdf
    • https://cdn.sqhk.co/fekerepusa/iegdTja/momisorufexukuj.pdf
    • https://leduxuma.weebly.com/uploads/1/3/2/8/132814900/fulilowa-bevigilajas-lixapuvotot.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fowikorejodi/guided_math_template.pdf
    • https://s3.amazonaws.com/fuzafuzeruwit/voban.pdf
    • http://vitupofelomar.epizy.com/diagnostico_de_salud_comunitaria_ejemplo.pdf
    • https://s3.amazonaws.com/nakuzafol/invitation_email_template_for_training.pdf
    • https://s3.amazonaws.com/xabalaru/vuwota.pdf
    • http://mutazuvedimirob.epizy.com/lodepemodamifokukabezo.pdf
    • https://s3.amazonaws.com/pulujolatepuv/cheap_acrylic_sheets_canada.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f423.bin
a5cc6b7688d5026c97cb1c0c6f6f77869dab277fda837c5e3475dbb1807b635b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 5624 bytes
font_01_sfnt_off0001072a.bin
8daf004c878fa3697c5d10eea3ccfdf2d3159188ef6c17284cc520bde1c75b89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1072A 10256 bytes

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