Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c14bea797bea7f…

MALICIOUS

PDF

73.2 KB Created: 2021-04-14 22:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: db30be203ddd3042dafca81e52d80f4c SHA-1: edb78980799dec6bdb47ce772fc9049e9c1f5328 SHA-256: 02c14bea797bea7f6f03fe7a5832af07999c98fa0e7d45d2929e6794a8551af1
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs likely serve as the initial lure, directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://baarspo.ru/strik?utm_term=calculus+textbook+online+pearson PDF link annotation
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/sufomasa-juvifarijita.pdfIn PDF document text
    • https://wafilanukeg.weebly.com/uploads/1/3/5/3/135309269/7df582856.pdfIn PDF document text
    • http://lotobajigufar.mywebcommunity.org/base64_string_to_android.pdfIn PDF document text
    • http://sodalabs.club/how_to_use_a_grid_graphic_designmaz82.pdfIn PDF document text
    • https://nubesojobe.weebly.com/uploads/1/3/1/3/131398221/a841d.pdfIn PDF document text
    • https://zexonozanefamiw.weebly.com/uploads/1/3/1/1/131163740/wufokulazodis.pdfIn PDF document text
    • http://com-connexion.xyz/kawitwzr1l.pdfIn PDF document text
    • http://manovina.mypressonline.com/35236505006.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/makitugudurisisuxofogi.pdfIn PDF document text
    • https://potomifor.weebly.com/uploads/1/3/4/3/134332951/5663380.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://9f5bcc56-a059-4f00-ae85-604acd6a3d2d.filesusr.com/ugd/ac9354_3212969d02004b16b73066889a8e3f40.pdf?index=trueIn PDF document text
    • https://f538c46d-6aff-4997-95da-320e40b30403.filesusr.com/ugd/262ba4_58aee8f021cc4f76b81d04c345237d6c.pdf?index=trueIn PDF document text
    • http://karokifewugasuz.onlinewebshop.net/jajukugafepurutesi.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/ma_pass_full_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/11605414210.pdfIn PDF document text
    • http://zeroxezubanalil.onlinewebshop.net/importance_of_fasting_and_prayer.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/information_about_titli_cyclone_in_india.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_4e02981bf5b84fa4901176812ecf30b7.pdf?index=trueIn 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_off0000d3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 5104 bytes
SHA-256: 1dafd022590cd444a11662d7e7ce4e90884a31058f1c6712a35eba32ca4835eb
font_01_sfnt_off0000e529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE529 10212 bytes
SHA-256: 105aa2f2a3c9ce251b49de8e9b1e7f66e8541269057521def63f6b3b6e9dcb3a
font_02_sfnt_off000107ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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