Malicious PDF — malware analysis report

Static analysis result for SHA-256 399e4225be187291…

MALICIOUS

PDF

81.3 KB Created: 2021-04-04 20:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b4704cfb09e75a5616d12133a83095a7 SHA-1: 1235245394cfe553f08914b97fdf3495510229d7 SHA-256: 399e4225be187291ca2c8844f7fa1e6943eac956088e9a374c41c9b04db45d25
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 0.9996

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://zajinet.ru/aws?utm_term=how+to+manual+defrost+freezer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390373/normal_60616dc89876c.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/human_psychology_101_download.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/calendario_bundesliga_2020_19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_603e967ba174f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468536/normal_6003ada58867e.pdfIn PDF document text
    • https://degexaxi.weebly.com/uploads/1/3/1/4/131406510/wegedita.pdfIn PDF document text
    • http://tegekagag.22web.org/ximav.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/2508743.pdfIn PDF document text
    • http://novazeku.mygamesonline.org/que_significa_el_poema_espero_curarme_de_ti_de_jaime_sabines.pdfIn PDF document text
    • http://beduwud.22web.org/53184348543.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://uploads.strikinglycdn.com/files/b30c0bb2-47fa-4029-b9d1-abd5f228c38b/molecular_biology_of_the_cell_impact_factor_2018.pdfIn PDF document text
    • http://wugerubuvugox.myartsonline.com/methods_of_venture_capital_financing.pdfIn PDF document text
    • http://dutuzapeka.rf.gd/network_marketing_business.pdfIn PDF document text
    • http://wurebosuloxu.myartsonline.com/dumixazilotobamereki.pdfIn PDF document text
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_59f24ed175994b0bafa54316a468296b.pdf?index=trueIn PDF document text
    • https://931f52e6-cb68-4a93-8e02-54808d33f8b6.filesusr.com/ugd/6290de_80c67480b25545fc9ee23b9b9e4d54ea.pdf?index=trueIn PDF document text
    • http://tenudif.epizy.com/tudetawizipazofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b531565a-6513-455f-813a-70e63412f7b0/xomedu.pdfIn PDF document text
    • https://78f121e6-5824-477f-9480-4bf23eba804c.filesusr.com/ugd/9564ad_ee330e2aad8e4519a20fcafe71bdf867.pdf?index=trueIn PDF document text
    • http://waweparijom.epizy.com/common_errors_in_spoken_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf3eafaf-711e-4e1d-b647-dbf26c5178d0/cant_get_liftmaster_remote_to_work.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E9 4988 bytes
SHA-256: 0669c75436b513417e4ca588d625a84f145dae423482d03b5220a30527728978
font_01_sfnt_off000103d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 11064 bytes
SHA-256: 10b225d36e3ad637358651eb23c8ff95a3c8d8551b567d4b7f7f21bca62ba195
font_02_sfnt_off00012997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12997 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.