Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ef0d71c26d6faf…

MALICIOUS

PDF

88.7 KB Created: 2021-02-26 10:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6dbaec4266d29468d4aa01651853c2a5 SHA-1: 238d6032162253fb441d1b5bfc24d12ff4789d93 SHA-256: 50ef0d71c26d6faffc0c7380a1d2b46dfc6c51a79455d9fd467805a9c2ee9ba2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. These links point to various PDF files hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to distribute malware or phishing content through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/award?keyword=1977+dodge+motorhome+value PDF link annotation
    • https://bagesasadav.weebly.com/uploads/1/3/4/3/134383367/kakinobo.pdfIn PDF document text
    • https://regasefes.weebly.com/uploads/1/3/1/8/131871592/9479608.pdfIn PDF document text
    • http://vovality.club/18295906752lz3zy.pdfIn PDF document text
    • https://cdn.sqhk.co/fedijadika/VsKhdja/43918639305.pdfIn PDF document text
    • http://gakofanotizukab.22web.org/additional_mathematics_drive.pdfIn PDF document text
    • https://biparobotimipus.weebly.com/uploads/1/3/4/4/134498468/zabuledobok.pdfIn PDF document text
    • http://mmmmmme.space/685593512780rl5.pdfIn PDF document text
    • https://lufegema.weebly.com/uploads/1/3/4/1/134132410/mifimope_viwoburevopopaz_fepepururo.pdfIn PDF document text
    • https://salufisudad.weebly.com/uploads/1/3/2/6/132695294/sedezejujoke-xatawebozot-gepukalebada-davarafilot.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/Vmhbr5C/offline_gps_navigation_app_iphone.pdfIn PDF document text
    • https://lojapajarete.weebly.com/uploads/1/3/4/5/134521209/zozolexanu-zugexotifome-xukafojafebot-nekokaripi.pdfIn PDF document text
    • http://tehnotop.site/acca_f1_video_lectures3odkr.pdfIn PDF document text
    • http://art-practice.org/bigipikedaroxavsjo8.pdfIn PDF document text
    • https://pamaxorakumi.weebly.com/uploads/1/3/4/0/134019068/retikafavuwifav.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/rphjDgj/life_after_death_in_hinduism.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gazitif/11027425087.pdfIn PDF document text
    • http://vajavugozuw.epizy.com/how_much_is_a_bowl_of_orange_chicken_at_panda_express.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/cisco_air_ap1142n_a_k9_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/paguwagop.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/internet_manager_apk_cracked_for_pc.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_off00011fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA0 5316 bytes
SHA-256: 64c1be35cde01e41840cd13aaadb69853411030a18749139fc39965503b93866
font_01_sfnt_off00013197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13197 10504 bytes
SHA-256: 0a228ed4b479bf5e5e0d8e9618d876727719e4be41c00074f8d693494eb5dc31

Open this report in the interactive analyzer, or submit your own file for analysis.