Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3dd0adb0190c1db…

MALICIOUS

PDF

81.8 KB Created: 2021-05-17 23:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 534d9bc2dfc52d305ee2500fa492a919 SHA-1: e6188f3f19b94f43c897c36e3d2915cbddfbe4dc SHA-256: b3dd0adb0190c1db382196544749c30e95d95e229d20be5bb2c28721680d4c4c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO poisoning tactic. One of the primary external URIs, 'https://midufefew.ru/strik', is likely a landing page for a phishing or malware campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/strik?utm_term=how+long+to+cook+woolworths+chicken+kiev+in+air+fryer PDF link annotation
    • https://fetubuka.weebly.com/uploads/1/3/1/3/131379928/kidubexukilono_duwuxovor_nizazizizaroja_sovosagegumova.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426270/normal_5fdf717e7bfe9.pdfIn PDF document text
    • https://zadevadetolilug.weebly.com/uploads/1/3/5/3/135321342/gezekibutekasogifu.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/4793715.pdfIn PDF document text
    • https://fenutirixe.weebly.com/uploads/1/3/4/6/134640366/8903046.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379237/normal_5fec9bbebcc8b.pdfIn PDF document text
    • https://pixirexujana.weebly.com/uploads/1/3/4/5/134527097/gakuduguwuleru_logafezine_minepivitidi.pdfIn PDF document text
    • https://ronojunigamedez.weebly.com/uploads/1/3/5/2/135297775/jodefuwiba_tepevileluruxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420939/normal_5ff8d349d6a8e.pdfIn PDF document text
    • https://bovuzujavus.weebly.com/uploads/1/3/5/3/135326818/pokojajeke_zedes_sizuluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_600aeffda8b6c.pdfIn PDF document text
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/wokupezix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_6020556e369c4.pdfIn PDF document text
    • https://biravozoso.weebly.com/uploads/1/3/4/4/134400929/milewemesana.pdfIn PDF document text
    • https://bosamekuxukis.weebly.com/uploads/1/3/4/6/134672370/rigegozutezi.pdfIn PDF document text
    • https://lerizizevu.weebly.com/uploads/1/3/4/3/134314130/00357857.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
    • https://s3.amazonaws.com/defujo/agatha_christie_books_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/ziratomikimogifuzodu.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/application_form_format_in_ms_word.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/vofonebaxejobajebiridudu.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/evenflo_chase_lx_harnessed_booster_car_seat_jubilee.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/hunter_gsp9700_road_force_balancer_price.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/56514309524.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/tolatiso.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_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 5212 bytes
SHA-256: 8474f07f6cc2767ae3a6063ba9bdd76a6f6bc59caf819affce6e335cd2b74ca8
font_01_sfnt_off0001044f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044F 11400 bytes
SHA-256: 143f6128d3fb4ce731f88e8b50750299874cdc291b9e3a431fb32b32755cfd3b
font_02_sfnt_off00012b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B18 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71