Malicious PDF — malware analysis report

Static analysis result for SHA-256 570d5aa995a9b881…

MALICIOUS

PDF

68.7 KB Created: 2021-03-04 22:53:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: eea2e7514f26ae55d8bb45fb4fedb914 SHA-1: e0d5285430d0dd1f4c4a06120191852101b52831 SHA-256: 570d5aa995a9b881125710b919555637005696b04ba3aafa99b61d591af85c2e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable hosting services, indicating a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the nature of the heuristics suggest an attempt to deliver a second-stage payload or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=pinoy+tv+channel+teleserye+replay+wow%25E2%2580%2594+telebyuwers PDF link annotation
    • https://zipuboxovasabe.weebly.com/uploads/1/3/1/4/131483293/6e5274d20771.pdfIn PDF document text
    • https://dodizavezoku.weebly.com/uploads/1/3/1/3/131398251/zinowiwej-bemuzuvu.pdfIn PDF document text
    • http://sputnews.com/what_should_you_do_when_you_park_a_vehicle_with_a_manual_transmission_on_a_hillhu4oo.pdfIn PDF document text
    • https://bujabofilurukok.weebly.com/uploads/1/3/2/6/132682168/1880568.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5ff229d04812e.pdfIn PDF document text
    • http://fbcopyright-center.com/ximexugomitt26u1.pdfIn PDF document text
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/4123850.pdfIn PDF document text
    • https://poteluteko.weebly.com/uploads/1/3/1/1/131164474/lezipuramanedowi.pdfIn PDF document text
    • http://obzorov.site/pepuzebasapurunoxevupot7nmw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457839/normal_6014733d0a058.pdfIn PDF document text
    • http://sale20.site/59563200825g3u0v.pdfIn PDF document text
    • http://delaem-sami.online/how_to_replace_samsung_dryer_heating_element_dv45h7000ew_a29cfb8.pdfIn PDF document text
    • http://shoop-fn.ru/chicago_manual_of_style_citation_generatorcjwaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gibeter.rf.gd/elasticsearch_check_index_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78e97945-779a-462c-a7f8-8908b96330e9/cuales_son_los_pasos_que_lleva_un_proyecto_de_investigacion.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/red_abstract_background_psd_free.pdfIn PDF document text
    • http://telenusu.epizy.com/anniversary_cake_images_with_name_free.pdfIn PDF document text
    • http://xemenorusameker.epizy.com/kipojujasejum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356b5ad1-c15c-47c7-a818-b99149dac6ec/tabela_de_preos_de_carros_usados_fiat_palio_2002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4879e1e-2591-426c-971d-827d86cb9ee3/4436690491.pdfIn PDF document text
    • http://nasalimutele.rf.gd/good_luck_synonym_slang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f570574e-f3f6-4411-800e-f7d169485690/97195040218.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/147d5cbf-ed7f-471c-8ebb-5949b7737935/91723523539.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_off0000ce19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE19 5448 bytes
SHA-256: 2811bd0a2d5e5aedec9954ac8caccae0524a1f01c34d70b94d45ed353689faa9
font_01_sfnt_off0000e0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 10024 bytes
SHA-256: f7200bc8ca9409bb02346c49131fd0dd89c64a6ff11e622c05eddf081ab11cd6

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