Malicious PDF — malware analysis report

Static analysis result for SHA-256 e217a80fea194be3…

MALICIOUS

PDF

93.2 KB Created: 2021-04-18 03:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 75a6e1d37e36fd255520783c773cd1ab SHA-1: 2786e396c99e4b3e55f3561fc1c569197daf4a10 SHA-256: e217a80fea194be397124559338c0833795ae11df934fdbbe307f0ec5ab6af5e
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The ML classifier strongly indicated maliciousness. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms this, indicating the PDF is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://kuzutuzo.ru/strik?utm_term=how+many+roald+dahl+books+made+into+films PDF link annotation
    • http://rimka.xyz/kimon_nicolaides_the_natural_way_to_draw_reviewozuye.pdfIn PDF document text
    • http://oblakova.ru/how_to_use_mechanical_timer_switch_for_lights578h0.pdfIn PDF document text
    • http://feelslike35.com/head_and_neck_cancer_esmo_guidelines_2016cjj1p.pdfIn PDF document text
    • https://voxipomawo.weebly.com/uploads/1/3/1/3/131379395/zesimoronarudilosa.pdfIn PDF document text
    • https://xajapimiwumorav.weebly.com/uploads/1/3/0/7/130739235/xopopekivazova.pdfIn PDF document text
    • https://betoxugibujimiv.weebly.com/uploads/1/3/1/0/131071043/1957766.pdfIn PDF document text
    • http://usejus.pro/red_cross_first_aid_course_launcestonnb395.pdfIn PDF document text
    • http://shoplus.info/wimogeduzusimlkt9e.pdfIn PDF document text
    • http://redpandarecycling.com/bonfiglioli_vectron_act_401_manualwx2r8.pdfIn PDF document text
    • http://varistop.site/96893804343eno7x.pdfIn PDF document text
    • https://nimimemuxigu.weebly.com/uploads/1/3/4/4/134488465/529889a5afc5.pdfIn PDF document text
    • http://50offstore.pro/romokahtccm.pdfIn PDF document text
    • http://center-san.ru/18111543280e2e2t.pdfIn PDF document text
    • https://gakewejodum.weebly.com/uploads/1/3/4/9/134902465/fccb151fe652.pdfIn PDF document text
    • http://servisvds.ru/wawalevjj27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pidufozu/13462023498.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668cea4e-8a54-4fa2-870d-729e01346632/baldurs_gate_3_multiplayer_save.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/netflix_app_android_8._0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0467fa6c-c8d4-4fe6-9433-6d6a351ffe49/fitbit_versa_lite_vs_versa_2_screen_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0353b92f-7421-4257-a51c-12bb8eec3764/john_owen_mortification_of_sin_audio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b80599f9-7720-4d15-a6cf-16bb8b65a35d/how_to_teach_health_assessment_to_nursing_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c701141b-fd8f-4f06-ab7e-4b2e229ebb7b/symbol_wireless_barcode_scanner_battery.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_off00013150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13150 5508 bytes
SHA-256: 559226f1c5eafdf4cad2d34aa29ef6e1c27990ac250b60cb833c378f2d58f249
font_01_sfnt_off000143e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E9 10288 bytes
SHA-256: c9d324f72c7611c92e363049397d51213469a58b87e2e2ed3ef0b5564f0da5e8

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