Malicious PDF — malware analysis report

Static analysis result for SHA-256 763c869982a4dcc5…

MALICIOUS

PDF

92.0 KB Created: 2021-03-08 17:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e932fd3493025572aca9baa6747598f7 SHA-1: 2aaa43500fe7aa714c67be918e718471cd968df6 SHA-256: 763c869982a4dcc59f90eaabcb49a3a1a1d62bd4600b8cee639e9465b94357de
194 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=download+gangstar+vegas+mod+apk+for+pc PDF link annotation
    • https://juleverut.weebly.com/uploads/1/3/4/4/134488806/pisisut-xavog.pdfIn PDF document text
    • https://pogipusuzifu.weebly.com/uploads/1/3/4/8/134869227/zizami-suzidife-zafit.pdfIn PDF document text
    • https://cdn.sqhk.co/ninoporaleva/jf3mibd/line_rider_unblocked.pdfIn PDF document text
    • https://zumaboletafu.weebly.com/uploads/1/3/1/4/131454272/380188.pdfIn PDF document text
    • https://femixazate.weebly.com/uploads/1/3/4/3/134363246/28499.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/1467522.pdfIn PDF document text
    • https://vinifobak.weebly.com/uploads/1/3/5/2/135298549/ximepedatiral-zivisegarebozop-tolipulufawaruf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391305/normal_5fe9ed6dc30f5.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/KjhghvZ/tasazirutaxikaxuf.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/zixobowekuvelet_noxuwufikemetuf.pdfIn PDF document text
    • http://roburupagosode.iblogger.org/rukuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_602a72bcb6a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_601faecfd5423.pdfIn PDF document text
    • http://gojuvop.iblogger.org/star_method_interview_questions_and_answers_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/tQjg4gd/82379679002.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387406/normal_60260c1a07952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369903/normal_602e2267cbce7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476768/normal_5febf97353920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_600ca0475f4ca.pdfIn PDF document text
    • https://gavanigo.weebly.com/uploads/1/3/1/3/131380609/762396.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koroxep.rf.gd/jupiter_japan_income_fund_fact_sheet.pdfIn PDF document text
    • http://nigiragesowujow.epizy.com/ielts_speaking_sample_test_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 5688 bytes
SHA-256: d8fb1e0255781b1536c2f7242cdd0ea5ef57a672097e552ace6a53aea3d683d4
font_01_sfnt_off00011086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11086 3208 bytes
SHA-256: 9564b821b39a718c583396ea7f6a0995b776ef858841a0633d0edc5c1e20721d
font_02_sfnt_off00011d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D90 11276 bytes
SHA-256: c0268082f462cc44a62263454082ed9049cbf3e16d90b2d246f178b156a6642e
font_03_sfnt_off0001434d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1434D 16736 bytes
SHA-256: 5ef0bae121ad2fc3d39cbf3a4bf30a171266549c46fd5142886d0e4bebae852e
font_04_sfnt_off000159d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D6 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d