Malicious PDF — malware analysis report

Static analysis result for SHA-256 966859583720e90f…

MALICIOUS

PDF

73.2 KB Created: 2021-03-10 17:09:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02131006b9cfb4346955143dd6df8b30 SHA-1: 9279daa107f722138bc3f2354e38b8eac6167c38 SHA-256: 966859583720e90fbe7b0124381bf1bc097c7a9dea895978bae4bac1d947d0f3
126 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs point towards a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=livro+auditoria+fiscal+e+tribut%25C3%25A1ria+crepaldi+pdf PDF link annotation
    • http://kexolifowuj.medianewsonline.com/how_to_clean_tefal_maxi_fry_fryer.pdfIn PDF document text
    • http://org-fruit.space/numetela8owb.pdfIn PDF document text
    • https://kupejuzog.weebly.com/uploads/1/3/1/6/131637034/fe23b74.pdfIn PDF document text
    • https://cdn.sqhk.co/pizililiv/jhv8fSd/24989296143.pdfIn PDF document text
    • https://wuvenenuw.weebly.com/uploads/1/3/1/3/131383928/c3934355.pdfIn PDF document text
    • http://registrat.space/how_to_describe_a_tequila_sunrise_by_the_eaglesixhpl.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwikiw/jgjbhhH/diamonds_imagine_dragons_traducao_whatever_it_takes.pdfIn PDF document text
    • https://cdn.sqhk.co/kapapomabu/LdhjgkK/42326875725.pdfIn PDF document text
    • http://collegegraduatecentraldating.com/441103154295p0y5.pdfIn PDF document text
    • http://varerafuvurine.22web.org/apc_smart_ups_700_beeping.pdfIn PDF document text
    • http://okstore.info/gotiketogomujenegh7lk5.pdfIn PDF document text
    • https://cdn.sqhk.co/xenudipu/jj1jchc/zowebobufejup.pdfIn PDF document text
    • http://pusulij.22web.org/omron_pedometers_at_target.pdfIn PDF document text
    • http://togaxifobuf.mypressonline.com/deferred_annuity_sample_problems_with_solutions.pdfIn PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/bewazasebuvuro_rekemem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viladanus.epizy.com/e_h_coriolis_mass_flow_meter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be256e7d-421b-4416-85f2-14bd42d4e5b7/how_to_repair_a_washing_machine_that_does_not_spin.pdfIn PDF document text
    • http://zozasozam.epizy.com/91133031427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e86f6e9b-c627-40e4-9d8e-3b971fe4a97f/psalm_23_nkjv_commentary.pdfIn PDF document text
    • http://desuvusemexemob.epizy.com/2005_chevy_trailblazer_manual_transmission.pdfIn PDF document text
    • http://tapoloferazuziw.atwebpages.com/gem_of_the_ocean_full_play.pdfIn PDF document text
    • http://fetekovabu.onlinewebshop.net/wotegowubixopipifep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99dbb4c2-075a-40bf-8243-aec5afb6b5da/dogelog.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_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 5524 bytes
SHA-256: 0086b8fddade9c656c73e4bbadb95542adc2722f7c37037e72861e1ce7e0c07a
font_01_sfnt_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 13380 bytes
SHA-256: a663c6819e5c807123443a60bc63dfc6b422f1b97b1cdeedf987d606dc105b3c

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