Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdef4fb6edddd27c…

MALICIOUS

PDF

75.3 KB Created: 2021-04-03 23:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 26f6b9214eefd521d347a810c3fc341d SHA-1: 6c6994321ec19e2eec2eba4b9f5be7d613bd2145 SHA-256: cdef4fb6edddd27c9163fba40b32905eaa791f71eb32e67f4a576f83cb02870e
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The document body, though partially corrupted, appears to be a lure related to 'El Capitan High School bell schedule'. No scripts were extracted, but the presence of numerous external links points to a phishing or drive-by download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/wix?keyword=el+capitan+high+school+bell+schedule PDF link annotation
    • http://dopogabijup.mywebcommunity.org/36445092813.pdfIn PDF document text
    • https://danupinizagene.weebly.com/uploads/1/3/1/4/131483344/5300291.pdfIn PDF document text
    • https://ruzudewalaxuge.weebly.com/uploads/1/3/4/4/134497745/3643617.pdfIn PDF document text
    • https://paruralevefux.weebly.com/uploads/1/3/0/7/130775474/2a87334.pdfIn PDF document text
    • https://novuwujuvum.weebly.com/uploads/1/3/0/7/130776589/85d10d91a0ae81.pdfIn PDF document text
    • http://paxejunon.mygamesonline.org/pidixekero.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/6285853.pdfIn PDF document text
    • https://zogelamugem.weebly.com/uploads/1/3/0/7/130775951/6950859.pdfIn PDF document text
    • https://posodukur.weebly.com/uploads/1/3/4/3/134347560/menepetajuponuwefite.pdfIn PDF document text
    • https://xebololu.weebly.com/uploads/1/3/4/3/134340913/12ced021de60bf.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/bomifemabojamagon.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://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_816b4b462f394e26aa5c08bb3eeea702.pdf?index=trueIn PDF document text
    • http://nojikigor.myartsonline.com/the_darkest_minds_2_movie_release_date.pdfIn PDF document text
    • https://6b551870-9d71-4c88-87ac-30bafd697196.filesusr.com/ugd/b27e13_6e9d646d154248b4b38fc343183463f3.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_44e673b1a6974db194b1ee72dd4232f7.pdf?index=trueIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_1c9a7017dde6427a92ccf09a4d4b7354.pdf?index=trueIn PDF document text
    • https://a3c73713-be4b-4c8d-a01f-dab92ecb4e1a.filesusr.com/ugd/5df860_5d69dda4514d4166a6c86aa78ea12a56.pdf?index=trueIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_479fe9bfd80b4a8a9e6614dfdd01e200.pdf?index=trueIn PDF document text
    • https://2cc3dcad-61c1-4442-8662-ca5be7cd8672.filesusr.com/ugd/71b93f_d314eab85ee84622bfbc6f2c8e9d397d.pdf?index=trueIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/79701845397.pdfIn PDF document text
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_c1d9070fd2464ef0b4ab622d9d69fd5b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD834 5220 bytes
SHA-256: d9bf33ff7359284e99f347091ee19e013916a2aa59c9df1baacabe3a39169c7b
font_01_sfnt_off0000e9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DB 11404 bytes
SHA-256: 1d7dcace150d0c01eeba637f2b1244610c818bff82e5c3faa62678a9ba297912
font_02_sfnt_off000110f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F6 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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