Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea3d2e65b63b407…

MALICIOUS

PDF

94.7 KB Created: 2021-03-14 05:59:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9330e589079b298d6e32694f168e4ce1 SHA-1: 114d6e085b8dd4be4a9b95c5a9f012af548af19c SHA-256: fea3d2e65b63b407b3fc2741828bde98e41b2bc72c0dfca1369689357c735010
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to PDF files on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were extracted, the structure and URL patterns suggest the primary goal is to redirect users to potentially malicious or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=depression+and+other+magic+tricks+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/penunotati/ggijHgc/uburyohe_by_charly_na_nina_audio.pdfIn PDF document text
    • http://sutovuresas.mygamesonline.org/mupimoredutanobar.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/ethical_issues_in_psychological_assessment_ppt.pdfIn PDF document text
    • https://cdn.sqhk.co/suxunuke/fkMghxZ/shooting_target_stands_uk.pdfIn PDF document text
    • http://kigumelez.medianewsonline.com/how_to_install_onyx_plus_sirius.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/QifghtH/19821231393.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/kenmore_70_series_washing_machine_wont_drain_or_spin.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/ser_bachiller_2020_preguntas.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/Wnid4he/97714755196.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369909/normal_6005d24be55b5.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/whirlpool_top_load_agitator_washer_reviews.pdfIn PDF document text
    • http://gadivawiw.sportsontheweb.net/kipus.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/how_to_change_a_rheem_furnace_filter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402964/normal_602f610d3d910.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/jgdVEuC/mawixipaxole.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padusij.onlinewebshop.net/serajuzamivoxatosad.pdfIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_3822031b174e4c8f8eb2d718762b00d5.pdf?index=trueIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_f6a3465034424d9e95249956cdf54cd4.pdf?index=trueIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_cffcf85a1bef49fbb1b57940a44a208e.pdf?index=trueIn PDF document text
    • http://jabejanaboz.atwebpages.com/beyond_the_walls_church_temecula.pdfIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_fecc0b3592d048f3b3aa041259ebf057.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_off000130c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130C2 5724 bytes
SHA-256: da76037077b04b4e5216b3a6e1733e68ddc0805b7cda293539212bb540a05330
font_01_sfnt_off0001442a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442A 12772 bytes
SHA-256: e507b9f00ab55b87dc4a27338c348a873a3b0e41d1c9bbdfbc6a9ec667ce1371