Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ad9299f35078f02…

MALICIOUS

PDF

83.0 KB Created: 2021-03-19 07:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d447f2da4896bc6de9849d9903035ff1 SHA-1: 24c549f8322877a51675a78a444765579dbcc283 SHA-256: 3ad9299f35078f021f9c493aef067cc4a0b93bf4ecdfde147f929bbd4cc3a418
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm on disposable hosting, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jottigo.ru/strik?utm_term=kindred+octavia+butler+pdf+online+free PDF link annotation
    • http://bimoriz.getenjoyment.net/electrical_actuation_systems.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5fcdb1f0ebca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459785/normal_602973c513f62.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/vampire_diaries_quiz_who_is_your_best_friend.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/48978175493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384463/normal_603a4e90102d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422390/normal_6047dd5343a78.pdfIn PDF document text
    • https://bilokomomaxin.weebly.com/uploads/1/3/5/3/135397692/4862573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_60134ea5180bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415937/normal_6007a97a357c0.pdfIn PDF document text
    • http://gotesesevuzi.iblogger.org/how_to_use_viewsonic_projector_remote.pdfIn PDF document text
    • http://jesurave.22web.org/mupanilozefowixumileziwit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447874/normal_602dd1838e369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_6029c888d3f72.pdfIn PDF document text
    • https://sopivumebisul.weebly.com/uploads/1/3/1/4/131413603/kusifokumak.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/what_is_3_characters_long.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_602c61d3ef850.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/pisinasam.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/wanosujilubosa.pdfIn PDF document text
    • https://sujoxiwu.weebly.com/uploads/1/3/4/8/134879933/4328378.pdfIn PDF document text
    • https://sezebotari.weebly.com/uploads/1/3/1/6/131636698/5326047.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5fcbf18acd3b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5aa221-35ae-4ea6-98eb-0803a2cb9c4f/69658309358.pdfIn PDF document text
    • http://zexukojol.rf.gd/hp_laptop_wireless_adapter_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad639427-ab31-46d2-ad5f-f81c27863094/how_to_find_the_volume_of_water_in_a_cuboid.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/mexafarani.pdfIn PDF document text
    • http://nosevutomos.rf.gd/54862376798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43123e2f-fb98-4bbe-b512-02461a28939e/how_does_evening_primrose_oil_help_induce_labor.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_off00010720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10720 5140 bytes
SHA-256: e8c8b216806e5a5201e794668503cc2a4c5603babf0a929a63f78b535e38f174
font_01_sfnt_off000118b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B8 10452 bytes
SHA-256: 5beb1ef33f56dd5855cddc930800ca40ab3aecf918c27804a348d9705ce95305