Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d758832b522a2b…

MALICIOUS

PDF

73.9 KB Created: 2021-02-24 19:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3f39b227b4bc948c86c4dc19b04d1365 SHA-1: 720390927fec3b676c723d89ad0172f4de4069c9 SHA-256: 89d758832b522a2bf2e645daf412042d424bc339698b70eef7ba30021641721e
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to redirect users to malicious content. The primary URL points to a page that appears to be a conversion table, likely a lure to disguise the malicious intent of driving traffic to other sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jacksth.ru/award?keyword=tabla+de+conversion+de+centimetros+a+pies+y+pulgadas PDF link annotation
    • https://koxabiniz.weebly.com/uploads/1/3/5/9/135994092/9768647.pdfIn PDF document text
    • https://ninegepidilu.weebly.com/uploads/1/3/0/7/130738727/pejov-dixomilup-kogadute.pdfIn PDF document text
    • https://lefewaxenu.weebly.com/uploads/1/3/4/0/134012542/ferexujekaxewirod.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/how_to_light_rheem_tankless_water_heater.pdfIn PDF document text
    • http://kininorekuwif.iblogger.org/the_white_princess_book.pdfIn PDF document text
    • https://girawosanisab.weebly.com/uploads/1/3/0/7/130740609/pibafigad_difagimuf_karara_lepibejagerilu.pdfIn PDF document text
    • https://cdn.sqhk.co/fezajuwu/cgdjcYc/20234287601.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/26778055492.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/hopper_with_sling_model_number.pdfIn PDF document text
    • http://pivowave.iblogger.org/10503236479.pdfIn PDF document text
    • https://maxazokal.weebly.com/uploads/1/3/1/6/131606281/nefoxexujijepi.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/jajfhgn/amazed_by_you_chords.pdfIn PDF document text
    • https://vimasideb.weebly.com/uploads/1/3/3/9/133997972/9497669.pdfIn PDF document text
    • https://kezidixujaroko.weebly.com/uploads/1/3/4/0/134040737/25abba56.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/jd3jjgi/simpleplanes_flight_simulator.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/pizexopenaxu/2013_jeep_grand_cherokee_review_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/50504760115.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/analytics_edge_edx.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_off0000dd7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 5644 bytes
SHA-256: 5b5484a436313384d74aaa1b70ceb8a536569b9d612be6f59e4daff62051645e
font_01_sfnt_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 12452 bytes
SHA-256: 098f85ea1ae21723d9c7d77b22f4a5f5d97553f366046f2248614fb4e8f4cef4

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