Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a109a82857caebc…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 17:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2e8e2a4686b3ca674234a9f9fa971731 SHA-1: 2f55946db9080a775ace9d1978998440ce56fd43 SHA-256: 3a109a82857caebc718d6703159d0e85fd38534716f3ae2a4fe4ca5b517ba49d
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous embedded URLs pointing to potentially malicious domains. The presence of these links suggests the document is designed to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://vilenefex.ru/aws?utm_term=google+search+dark+mode+safari PDF link annotation
    • https://cdn.sqhk.co/pabukerofo/gicgj1W/68836804684.pdfIn PDF document text
    • https://cdn.sqhk.co/tubadaluzafu/hjxigjb/60282195926.pdfIn PDF document text
    • http://world-wild-shop.com/somowezq2lvc.pdfIn PDF document text
    • http://pay-order.info/yahoo_for_laptop_windows_7se3og.pdfIn PDF document text
    • https://cdn.sqhk.co/joxopejufito/dDxjeSq/85158882992.pdfIn PDF document text
    • http://zobebukore.22web.org/98473699999.pdfIn PDF document text
    • https://cdn.sqhk.co/kesumixom/jisjehd/magipa.pdfIn PDF document text
    • http://tomidubuvizoja.iblogger.org/69849656341.pdfIn PDF document text
    • http://fevumajugo.iblogger.org/on_green_dolphin_street_alto_sax.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/jfgeshh/dimozetuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/edZyihQ/gigajabe.pdfIn PDF document text
    • http://prizinsta24.space/harbor_freight_predator_3500_watt_generator_coupon15g2u.pdfIn PDF document text
    • http://mjawebdesign.net/2017_football_playoff_bracket8yak4.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvupalib/jicodjb/48106430769.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/fjgjjML/activity_book.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/Cm9jfWu/13324013923.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pewubep.rf.gd/english_story_books_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/degijo.pdfIn PDF document text
    • http://numumodi.epizy.com/apostrophes_for_possession_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/a_level_biology_edexcel_topic_3_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/how_to_give_the_ssi-4.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/java_code_examples_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/dushman_film_ke_song.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/55960828693.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/98619681341.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5132 bytes
SHA-256: 4244bf6c3e8025ff280f08451ac5a02063657de510b425117c65737ce1e4f7e9
font_01_sfnt_off0001018a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018A 10860 bytes
SHA-256: 1ca192fc6931df978626250ab69812787860df7f3a1c705365ddc3578a97898b
font_02_sfnt_off0001268b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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