Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a8c5ff1c0890a7…

MALICIOUS

PDF

78.7 KB Created: 2021-03-28 05:47:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 962d4c04a6c82288797800f5def6a5cf SHA-1: b10fe4e8076431bab46e7e6937a5d1fd207e139a SHA-256: 50a8c5ff1c0890a722ce9185236e7f6b4e7df225e2c3b5684edacd3dbb5f16ca
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://botokaw.ru/wix?keyword=pain+naruto+body+pillow PDF link annotation
    • http://yewes.space/she_stoops_to_conquer_essay_topics7sh01.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/jjjjggg/moto_e_file_manager_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_605fb07b02cf8.pdfIn PDF document text
    • https://pufenenuboz.weebly.com/uploads/1/3/0/7/130738511/mimijubuforaza.pdfIn PDF document text
    • https://wurudejokifar.weebly.com/uploads/1/3/0/7/130776262/e53ca97.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/xudupepojutife.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/EBuBhbM/i_am_innocent_ios_cheats.pdfIn PDF document text
    • http://naturalm.space/how_to_find_outermost_electronsa7sbi.pdfIn PDF document text
    • https://latitatuforuza.weebly.com/uploads/1/3/1/3/131398212/pegusip_mibevazew_lawupo_kuxoko.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/6496059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_6009b41e1a874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_601e1276ee7f0.pdfIn PDF document text
    • https://cdn.sqhk.co/lusajiki/hb9gjjh/jozelis.pdfIn PDF document text
    • http://tiktokfrance.fun/hp_elitebook_2740p_touch_driverscs69r.pdfIn PDF document text
    • https://cdn.sqhk.co/tunixomaj/idBsf7z/51131753867.pdfIn PDF document text
    • https://cdn.sqhk.co/zatovafer/hjEheGx/kenekikobubif.pdfIn PDF document text
    • http://eurosett.net/what_is_the_correct_order_of_harry_potter_movies9zl2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378848/normal_5fe6361fd1274.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/wupiwupiwot/solorutejutom.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/canzonetta_sull_aria_free_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86c49a3a-7c8a-4e64-bc92-7f28d20048f3/vivitar_dvr786hd_troubleshooting.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/cv_format_for_job_application_in_bangladesh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1afc051a-574a-4ec3-9ae2-932e0a4e39dc/tiwematapimekutoxoramokeb.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/conceptual_analytical_and_report_writing_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/android_default_button_color_hex.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_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 5112 bytes
SHA-256: ab3b95138a0a3f0a8a12f7a32aad8dd9b747a210642289c6e1ce06286f89073c
font_01_sfnt_off0001073e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073E 10740 bytes
SHA-256: ee1a9deb4dafb9f25af77757b491e4129c279a87d0ac9a08921ab8b98a410a01

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