Malicious PDF — malware analysis report

Static analysis result for SHA-256 8814d071e9621d74…

MALICIOUS

PDF

83.1 KB Created: 2021-03-03 18:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 435d44b1ac9e28db23575cbd77b3082a SHA-1: 55d85524b8a3a64bd1fea7a26161afc4e1d10f92 SHA-256: 8814d071e9621d7469f561da5f38da19625ee5142a27b0e71a27ce7a157dfafd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the 'SEO_DISPOSABLE_LINK_FARM' heuristic confirm the document's role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/wix?keyword=fluent+python+pdf+%25D0%25BD%25D0%25B0+%25D1%2580%25D1%2583%25D1%2581%25D1%2581%25D0%25BA%25D0%25BE%25D0%25BC PDF link annotation
    • https://rapafasevujeto.weebly.com/uploads/1/3/0/7/130775542/tetura.pdfIn PDF document text
    • http://zegererevez.medianewsonline.com/how_does_the_adt_remote_work.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/hard_math_questions_for_adults.pdfIn PDF document text
    • http://world-wild-shop.com/ace_attorney_trilogy_emulatorfrpkz.pdfIn PDF document text
    • http://static-start.top/3535138994kz1u7.pdfIn PDF document text
    • http://badge-verification-center.com/piebald_dachshund_with_blue_eyes3x1bd.pdfIn PDF document text
    • http://piwudev.iblogger.org/fidic_construction_contract_template.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/2682094.pdfIn PDF document text
    • http://koteyarn.moscow/formula_racing_formula_race_in_car_2020hyh32.pdfIn PDF document text
    • https://pudiwozi.weebly.com/uploads/1/3/4/5/134510484/meletoma_zoburuboto_wefaligu.pdfIn PDF document text
    • https://sasepanubur.weebly.com/uploads/1/3/4/6/134600976/c1a97c.pdfIn PDF document text
    • http://afracheat3.xyz/kalimba_tab1a7cp.pdfIn PDF document text
    • http://100naturals.fun/ionic_bonds_gizmo_assessment_answers6hjjt.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/2187923983.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/ruzumeb/87511314874.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/barso_re_megha_megha_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/cuddledown_sheet_sets.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF705 5604 bytes
SHA-256: bcce837cfec21ba90a42285428a364358d6d875d9fae60a4d4eb23d553769667
font_01_sfnt_off00010935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10935 16828 bytes
SHA-256: 3bccffe97348db66a9a7981e7a0ba2e6db8ec4239762591f9b0fb3aff3d6bb57

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