Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb93e71e41bbc8c…

MALICIOUS

PDF

65.6 KB Created: 2021-02-11 09:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 460f424052c137a6a1bcb5d544cca7a2 SHA-1: 6e9f429287958b8696b489c9587f650a98b49c87 SHA-256: 8bb93e71e41bbc8cc0d7ab7b27236d7e5b72386c9c718e34fe51b91381096c63
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for malicious actions.

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://druttle.ru/aws?utm_term=overleaf+template+master+thesis PDF link annotation
    • https://mejebepagomuda.weebly.com/uploads/1/3/4/4/134494428/zasulupopizilupezeki.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/1841728655a9a30.pdfIn PDF document text
    • https://cdn.sqhk.co/kikutajaz/gcijgja/66714636367.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/kjfnnJq/finding_blue_free_download_apk.pdfIn PDF document text
    • http://leadtop.co/zasidiwupididikabokte4dp.pdfIn PDF document text
    • http://canonsburglake.org/nemopoxuperefutedinanxrv8t.pdfIn PDF document text
    • https://cdn.sqhk.co/mozulunilex/4jevhfe/among_us_stickers_whatsapp_iphone.pdfIn PDF document text
    • http://kino-vezde.ru/active_and_passive_voice_exercises_for_class_8_icseayl2j.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/ljhReL2/fododabufonigubisemudo.pdfIn PDF document text
    • http://vkysnaya-eda.site/kipebepuzejiselusedecjwnp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gipatoxusopupos.epizy.com/sedukarimubin.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/29274422878.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/point_break_movie_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/anchorfree_hotspot_shield_for_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/amphitheater_plan_dwg.pdfIn PDF document text
    • http://ligumawi.epizy.com/65456181681.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_off0000c313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC313 5228 bytes
SHA-256: 45db31589527bb60d62b1fa04cd56bfeb843939986fe5d8a5b01684993c18392
font_01_sfnt_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 11028 bytes
SHA-256: 6c0da0c6ef154fecc9b061c4479419b22c453a12b7d4f095f1312809f93893ff

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