Malicious PDF — malware analysis report

Static analysis result for SHA-256 3712bf63d229199b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-30 02:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b65db2c4e0a7333af07d8ec4d835395a SHA-1: 4ca5e026f12406fe9bc2351642d9c3f33db6e370 SHA-256: 3712bf63d229199b41651a051afe3708898cc76276dc54d236f75d554f60faea
126 Risk Score

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 0.9991

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://baarspo.ru/award?keyword=learn+french+by+podcast+pdf+free+download PDF link annotation
    • http://baliferifopiz.mypressonline.com/51018114592.pdfIn PDF document text
    • http://trikotoria.ru/skinner_operant_conditioning_theorya4o3c.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/301370.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/mixenexavuni.pdfIn PDF document text
    • http://xarusogu.22web.org/not_20_anymore_song.pdfIn PDF document text
    • http://igafnd.org/dofitumoxinoxijajurue9qkp.pdfIn PDF document text
    • http://avit0.pro/951906984396s2qs.pdfIn PDF document text
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/bagusix.pdfIn PDF document text
    • http://leoidet.xyz/puxalarinuwonakigizidok4t30u.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/mudatujowawewemut.pdfIn PDF document text
    • http://nutosolawuxa.iblogger.org/cozy_house_microfiber_sheets.pdfIn PDF document text
    • https://zaruneza.weebly.com/uploads/1/3/2/8/132814400/rakejuguxawimipivori.pdfIn PDF document text
    • http://tobalalupuvobiv.iblogger.org/hp_2013_ultraslim_docking_station_firmware_windows_10.pdfIn PDF document text
    • http://trokot-new.online/sadofotakogugoteb6pkvo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fikikozazilut.rf.gd/assassination_classroom_ost_free.pdfIn PDF document text
    • http://latajixow.epizy.com/71413473561.pdfIn PDF document text
    • http://wepiliga.epizy.com/process_flow_template_ppt_free.pdfIn PDF document text
    • https://7a69a04d-b0b3-478e-a927-895b34d3dd44.filesusr.com/ugd/159848_231eeb8e9ad3440eaf04c34d83314df3.pdf?index=trueIn PDF document text
    • http://lozufifeme.epizy.com/pathophysiology_of_coronary_heart_disease.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_bd4b3ec3d8514d1bab5135486e0ca618.pdf?index=trueIn PDF document text
    • http://rixibedi.onlinewebshop.net/springfield_ar_15_stocks.pdfIn PDF document text
    • https://fa886832-b9e3-4ce5-a98c-97da2614721f.filesusr.com/ugd/9f8050_5dbc4cff8815442fb19e82ba81407661.pdf?index=trueIn PDF document text
    • http://sonasekofuxix.rf.gd/action_games_for_android_2._3._6.pdfIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_2b92d5ad781f49bf9c8f09cf593ec409.pdf?index=trueIn PDF document text
    • https://538d8494-0c7d-401a-b890-0485f6bc7bca.filesusr.com/ugd/29c71c_bae72d99e7ef42fcbc4229ce224c530c.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED33 5520 bytes
SHA-256: f8a6ca7e93fcecc3b7cd6a338b8c28cf2abcec512b69853c5b77a375c2702750
font_01_sfnt_off0001000a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000A 11356 bytes
SHA-256: 9ec4bc0789cac30150429d423a39aa0ba0a40dc6360e2edfc483bba4d29458ce

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