Malicious PDF — malware analysis report

Static analysis result for SHA-256 269cbe57de6c50e1…

MALICIOUS

PDF

77.4 KB Created: 2021-03-03 16:46:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: df9b12a750e8dc7359eca53e085ac97e SHA-1: 4d550b7157ebcd33cda3c5978e46fc151a1cbbe2 SHA-256: 269cbe57de6c50e1616c94cae101038f0dafe780fc523642409343dd3508f240
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary lure appears to be a search result for a book appropriateness query, directing users to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/123?utm_term=is+the+book+hatchet+appropriate+for+fourth+grade PDF link annotation
    • https://cdn.sqhk.co/porosobof/IDyhdjg/smash_mouth_covid_song_video.pdfIn PDF document text
    • https://xanixozejalupu.weebly.com/uploads/1/3/4/8/134873627/3142284.pdfIn PDF document text
    • http://wedipum.mygamesonline.org/fivovamikokunuvovib.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/ae52cb8.pdfIn PDF document text
    • https://fapudunaga.weebly.com/uploads/1/3/0/7/130776769/4270198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_602452dca1804.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/bible_study_on_the_blind_man.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/ven_ven_senor_no_tardes_letra_y_acordes.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/JY3khfb/toolbox_for_minecraft_pe_1._16._40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454691/normal_603c4116d202e.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/8201b08d8.pdfIn PDF document text
    • https://cdn.sqhk.co/fubafonu/TVBihbi/kuzupowojo.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/best_oral_b_electric_toothbrush_uk_2020.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/lenovo_t420_laptop_adapter.pdfIn PDF document text
    • https://cdn.sqhk.co/miwataxanis/gfrjjia/instagram_chinazone_tattoo.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/17092580794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_60356d6413b3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojufuka.atwebpages.com/74227816419.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/90690145838.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/manexejitunozomojelexid.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/belated_happy_birthday_images.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/journey_to_the_center_of_the_earth_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/application_x-_www-_form-_urlencoded_json_ajax.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_off0000f2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D2 5524 bytes
SHA-256: 4e85324dabb1bdad9bc3f01bed3deb05cbebb9f6faf01302da67c0db13471b63
font_01_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 9972 bytes
SHA-256: 728b43bfa69fb784ca77024e8978352f3c5c785d20db8a8cee40bdc28dc004ac

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