Malicious PDF — malware analysis report

Static analysis result for SHA-256 727d95d4a450803f…

MALICIOUS

PDF

76.5 KB Created: 2021-02-22 07:00:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b749d6de8423300fb374f2c3817a7cf6 SHA-1: b39e97c18251bcf87ed5a253896b0657c256bee0 SHA-256: 727d95d4a450803f9736363de03936425510ac65191e58be26717ba3ddeba68e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, suggesting it functions as a link farm or phishing lure. The presence of external URIs and a link farm on disposable hosting further supports its role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=sift+heads+0+unblocked PDF link annotation
    • http://dutuvowori.22web.org/712221784.pdfIn PDF document text
    • http://gupupokuvugal.22web.org/how_do_you_find_the_volume_of_prisms_and_cylinders.pdfIn PDF document text
    • https://cdn.sqhk.co/suxavawudomo/gepicQk/sajulodebo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5fc82a5244623.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480585/normal_5ff355e97a58c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_60301cf61245e.pdfIn PDF document text
    • http://daimontimur.org/how_much_is_epic_emrlvrwl.pdfIn PDF document text
    • http://tdsevsvet.ru/sap_basis_tutorial_for_beginnersm6qgz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489716/normal_602c0b7c3e8b4.pdfIn PDF document text
    • http://gufutaca6.xyz/peekay_trke_dublaj_izle_indir05lzj.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizilo/KSrjdbZ/border_patrol_phone_number_texas.pdfIn PDF document text
    • http://profer-opt.ru/55088605545oqii2.pdfIn PDF document text
    • http://legendnat.space/nurajawoxare0kjiv.pdfIn PDF document text
    • http://kipivejezijab.iblogger.org/happy_birthday_song_naa_songs_telugu.pdfIn PDF document text
    • http://kemytbok.xyz/nojotazlvk02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485446/normal_5fd6e36be85a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_601e5bca1f1ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455176/normal_5fdefbd6e4abc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368777/normal_6021fb4da7f88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://selosaxugi.epizy.com/free_gdpr_compliant_privacy_policy_template_uk.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD103 5464 bytes
SHA-256: d1a704af41e375c545e146de4cbef59ca6c43c01fa385cf7a4216a5efdc9b73c
font_01_sfnt_off0000e389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE389 10284 bytes
SHA-256: d973d4945aea4f8fbcdf5be7391726f2d3227b55e287438337f7f5b90e49e830
font_02_sfnt_off00010077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10077 10740 bytes
SHA-256: 147f5043efcfc4a6189c93b6428bf7dd503e374c6f1dc581cbb1a4df84e87190

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