Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c710ad76887269…

MALICIOUS

PDF

69.5 KB Created: 2021-03-27 21:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e85b078e5e7888b195d56a7ac3f61b57 SHA-1: c65e0b30be0e6dfdd2c217ef522788c0b510b420 SHA-256: 53c710ad768872697151009da7b8797b948d479287103d19dca4e028f1d8c8fb
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 detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though partially corrupted, contains text related to 'Oncor street light', likely a lure to entice clicks on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/wix?keyword=oncor+street+light PDF link annotation
    • http://gubixazolela.sportsontheweb.net/moralistic_therapeutic_deism.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/dovasil_tupuzanebafuka_lifamewidinamig.pdfIn PDF document text
    • https://lavozeto.weebly.com/uploads/1/3/0/7/130775819/2423dfa8563e.pdfIn PDF document text
    • https://jomigotub.weebly.com/uploads/1/3/4/7/134748998/fomofipo_rulozuson_tonewedofeva_xinigudekaza.pdfIn PDF document text
    • http://kujunat.medianewsonline.com/munisabezon.pdfIn PDF document text
    • http://dozujudu.iblogger.org/livijovame.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/leteraxewe/9640743940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a04d07e-2480-4a5e-84de-c62cd32fd6cb/85695194158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89f2a32-f127-48eb-aeba-08d9c36c0064/72997490708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23a4149b-4685-4fa4-bab3-f4c4efda5741/zilopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa0c4d0-a09a-4205-b849-4b4cfb858831/feginavijilesapesejopo.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/shiwaw_arabic_songs.pdfIn PDF document text
    • http://pogedezibak.rf.gd/cheat_axes._io_mod_apk.pdfIn PDF document text
    • http://zopefunexot.epizy.com/35345502812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeeb0527-472c-4779-87c1-d3d29efe0ff0/39071531178.pdfIn PDF document text
    • http://kojuvurapamox.myartsonline.com/nios_dled_assignment_front_page_design.pdfIn PDF document text
    • http://sofidubanelen.epizy.com/91809630490.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/91064905571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdce2257-4c7e-4a55-a9a0-0c503b283c59/33525684267.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_off0000d4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E6 4880 bytes
SHA-256: 3086772d478bda4b928e93d2b61b8b6f3672fc22942726aacef2a8f3eedc97a8
font_01_sfnt_off0000e57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57A 10572 bytes
SHA-256: fcc3bf0f83a6270296e356d7d6e5d50718445ea731cc690a5a3993ffc4039664

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