Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdff8772baaeb521…

MALICIOUS

PDF

82.9 KB Created: 2021-03-13 17:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b06c90e3929d151f8980b314a0d3dd80 SHA-1: 415dfbf481ed6bc2455b36ee479967255214c39e SHA-256: fdff8772baaeb5219bb59a6cc96be4b1ad53de5578d07693822031487ecf6b25
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://maypoin.ru/strik?utm_term=turbochef+i1+sota+price PDF link annotation
    • https://gutirevenomosub.weebly.com/uploads/1/3/5/4/135400373/wijoru_fubulezidu.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/eUcPfFZ/boots_bouncy_ball_song.pdfIn PDF document text
    • https://cdn.sqhk.co/gadujotev/iMggjhL/deus_ex_mankind_divided_golem_city_merchant.pdfIn PDF document text
    • https://vesepuzimimewij.weebly.com/uploads/1/3/0/7/130776402/dasogilujog-butimo-sesemozapetod.pdfIn PDF document text
    • https://pixumoxijabana.weebly.com/uploads/1/3/4/7/134748481/romopo.pdfIn PDF document text
    • https://cdn.sqhk.co/kiraxozi/haTjbii/15684416263.pdfIn PDF document text
    • https://cdn.sqhk.co/goxufime/cijhdNm/all_slots_casino_app.pdfIn PDF document text
    • https://babanude.weebly.com/uploads/1/3/4/0/134017813/7cd6e94d34ed69e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389352/normal_604a3c5cb0165.pdfIn PDF document text
    • https://mikazeral.weebly.com/uploads/1/3/2/3/132303371/986798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_6010ff1306eaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495686/normal_6016fb7b9df4a.pdfIn PDF document text
    • https://serudifatu.weebly.com/uploads/1/3/5/3/135324897/robizefugegolunemawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500186/normal_601a834bea9c4.pdfIn PDF document text
    • https://xodumusekow.weebly.com/uploads/1/3/4/7/134708755/3184054.pdfIn PDF document text
    • https://sujumakatu.weebly.com/uploads/1/3/1/3/131379709/7bca5d1a2b2c3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494166/normal_604038af4a06b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484370/normal_5ff174b2406b3.pdfIn PDF document text
    • https://bowejobopuzepu.weebly.com/uploads/1/3/1/4/131406154/wamijuwarodufosiw.pdfIn PDF document text
    • https://jitebogegamoma.weebly.com/uploads/1/3/4/7/134761197/natojitumodos-zidoxefutev-xikuwizovukuti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384030/normal_6046975521218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381551/normal_6036c1540e6ce.pdfIn PDF document text
    • https://sofodifimujinem.weebly.com/uploads/1/3/4/2/134234674/rewuwujepina.pdfIn PDF document text
    • https://xinagaxigivawiv.weebly.com/uploads/1/3/0/7/130739766/visezojamutefu_wofidow_funisimadeso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371020/normal_5ff6729960d92.pdfIn PDF document text
    • https://karujelibofab.weebly.com/uploads/1/3/1/4/131406149/tuwotejoki.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
    • 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_off0000f8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E1 4988 bytes
SHA-256: 803342c97d4cd1f32f6dffa5c32acca5b5e13f239d312397624d852334bb53b8
font_01_sfnt_off000109f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F0 10632 bytes
SHA-256: ea1687e8dc0152f50a36f31074c9c30ee9d3fa6c576ea744b2996880fb9141de
font_02_sfnt_off00012e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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