Malicious PDF — malware analysis report

Static analysis result for SHA-256 446489bc4a8586f1…

MALICIOUS

PDF

78.9 KB Created: 2021-05-15 09:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ee99a9ec56f074e503b6624b6843a32c SHA-1: 21e7dc297485215589f6bd3ccf61096a80dbee71 SHA-256: 446489bc4a8586f1260def402959feb103d759f47b6676ada568aa8d853838b2
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to suspicious domains, including one that appears to be a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and link farm heuristics points towards an attempt to direct the user to a malicious site.

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://mezovuduw.ru/strik?utm_term=how+much+does+total+fitness+cost PDF link annotation
    • http://adachivia.store/epson_workforce_wf-3640_scanner_not_working464ze.pdfIn PDF document text
    • http://nebofimanigi.sportsontheweb.net/how_to_control_panasonic_tv_with_iphone.pdfIn PDF document text
    • https://rotaxavevun.weebly.com/uploads/1/3/4/8/134884867/293041.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/celiakia_i_dieta_bezglutenowa_praktyczny_poradnik.pdfIn PDF document text
    • https://gimalijuvilonur.weebly.com/uploads/1/3/4/6/134619020/jaluxazifewib_mukogotofani_mukozojivuge_finizig.pdfIn PDF document text
    • http://fiwisud.getenjoyment.net/xopibeb.pdfIn PDF document text
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/3d12edbff87dd2b.pdfIn PDF document text
    • http://samo-katim.ru/34195714703grn82.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/binary_search_in_data_structure_using_c.pdfIn PDF document text
    • http://kobodesuwid.getenjoyment.net/delumizob.pdfIn PDF document text
    • https://xiduxerajul.weebly.com/uploads/1/3/4/6/134696605/tulunizumi.pdfIn PDF document text
    • http://bukudix.getenjoyment.net/domestic_wastewater_treatment_process.pdfIn PDF document text
    • http://bitsracing.net/how_to_child_lock_panasonic_microwaveluayl.pdfIn PDF document text
    • http://cesaregaspari.com/sajenisobaxufejip04c6z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pimimozoji.myartsonline.com/astro_del_ciel_accordi.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/which_kindle_is_model_d01200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3149ebe-c13f-4d27-b200-6c1bcd4fff9c/tisolajigadosan.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/norma_buen_inicio_del_ao_escolar_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34c3ddb-2cec-4e18-a1f6-0b7c0d010207/kisaxekobap.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/show_battery_percentage_android_5._1.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/zudavipupazunukuki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb03aa0b-4521-48f7-8da5-58804632feeb/dogovorilurevatadifu.pdfIn PDF document text
    • http://futebowa.atwebpages.com/drawing_for_fashion_design.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/is_there_a_land_of_stories_movie.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/90934689192.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ada942-c231-4e95-914d-3cdf1d701a92/nirenipugukidobimo.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_off0000f4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A2 5216 bytes
SHA-256: 883f470ff1c492f7dc0245b7cc21153b0be3004450182581cf413f8b19d26a2c
font_01_sfnt_off0001064f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064F 11120 bytes
SHA-256: b295a61838fb98d0279c360f1ca312ae02a96ec4f5644a068a99cbf1d3563dfe