Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3c7127fb34ce48…

MALICIOUS

PDF

74.5 KB Created: 2021-03-22 02:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1796fcc8c09463cc5ef95808b7cfc261 SHA-1: 2092b7d5aa021848bb3e4f2f78386b62cce1d26d SHA-256: eb3c7127fb34ce487810abbe19bb708fa77feff4d9232aeaef15a9c75cfdf151
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs and the document's structure point towards a phishing or ad fraud scheme, likely attempting to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xezojetit.ru/award?keyword=adjektivdeklination+mit+dem+bestimmten+artikel+%25C3%25BCbungen+pdf PDF link annotation
    • https://cdn.sqhk.co/gujuvizaja/Ridjdgj/nawiwejipuvategukixorex.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/dosoni.pdfIn PDF document text
    • https://fukenotaza.weebly.com/uploads/1/3/2/7/132740373/4d8e29df6a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444853/normal_5ff015e0640d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473322/normal_60038939dea51.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/icKFChf/tomb_of_the_mask_color_level_49.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/FjbEFgh/domutiburasos.pdfIn PDF document text
    • http://copyrightnotices-form.com/how_many_calories_are_in_a_cheesy_bean_and_rice_burrito_from_taco_bellz9d7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_60499ad5ef3da.pdfIn PDF document text
    • https://witufulovavivoj.weebly.com/uploads/1/3/4/3/134351467/c3296e4.pdfIn PDF document text
    • https://romadixisom.weebly.com/uploads/1/3/2/6/132681692/sinikujizekon-rozelokojigek-gesipegu.pdfIn PDF document text
    • http://opensalon.xyz/215123641091sf4t.pdfIn PDF document text
    • https://cdn.sqhk.co/bumadawab/JFrUjju/napifajokowu.pdfIn PDF document text
    • http://study-english-04.space/leisure_bay_spa_filter_changeblwaq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_60394637c9791.pdfIn PDF document text
    • https://cdn.sqhk.co/lunabati/ghgdyih/kekipevukuwuzipo.pdfIn PDF document text
    • http://tendernes.ru/nutavikiguvenixixubabifixsvc6u.pdfIn PDF document text
    • https://tedogiji.weebly.com/uploads/1/3/0/7/130775371/7058376.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/bitajemisajoz/que_sera_sera_indonesia_translate.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_e98b04ff0997426f93e1ced96b30933c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/feseni/amorous_1._0.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/rolonorijipalilula.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_0e8781af1f4242ceb04b1ef92a7347a7.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 5812 bytes
SHA-256: f502d1b951096d31306d11a5a6bbc90948e4cc777138088f3e57a817b301ec24
font_01_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 11996 bytes
SHA-256: 4cf0c4c3243c9e35c0ef5eaa19543b07e08be4fae076db7522ab25b0a9985bdb