Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0792e779fb76d83…

MALICIOUS

PDF

73.5 KB Created: 2021-06-07 13:38:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2bb935e2681c0474965878c54f305bca SHA-1: 5862be4cd594ca7969eceeeaf1745aa0ed68bd57 SHA-256: e0792e779fb76d83b3ce23677901457f02fd21932dc9dcab4739ba82d8e9b518
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ketchas.ru/pbw?utm_term=stacey+lloyd+2014+answer+key+using+ethos+pathos+logos PDF link annotation
    • https://tufizesux.weebly.com/uploads/1/3/4/5/134596030/kuzijilezugeku_sevotig_nofeki.pdfIn PDF document text
    • https://zomanuvid.weebly.com/uploads/1/3/4/4/134477829/911be23856cf.pdfIn PDF document text
    • https://rewoseluvepe.weebly.com/uploads/1/3/4/6/134683186/1afe0d27a7e659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_603383c2dbba8.pdfIn PDF document text
    • https://mafinejolid.weebly.com/uploads/1/3/2/6/132683008/2295669.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409417/normal_5feb6d276fb36.pdfIn PDF document text
    • https://fuxopejebema.weebly.com/uploads/1/3/4/0/134018858/wisubit.pdfIn PDF document text
    • https://jibametugo.weebly.com/uploads/1/3/4/4/134486067/runujizajenutog-ketub.pdfIn PDF document text
    • https://ratewanevunexem.weebly.com/uploads/1/3/2/6/132681210/4534590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_60177698861d9.pdfIn PDF document text
    • https://daguvosiliwu.weebly.com/uploads/1/3/1/4/131406153/zimeporejomedaxalavi.pdfIn PDF document text
    • https://fudisilutopunus.weebly.com/uploads/1/3/1/4/131438012/4274886.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_602d8e169509b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_60b9cd1ea1e62.pdfIn PDF document text
    • https://resewirebibabap.weebly.com/uploads/1/3/1/3/131379054/94441a2b19e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gajufabeke.pbworks.com/f/present_simple_and_present_continuous_exercises_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44432064-886a-456c-b570-3f1065293c87/i_itouch_curve_smartwatch_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef729cbd-7e82-4b7b-9d46-bf1bbd69b1a7/porter_cable_c2002_pressure_relief_valve.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/gevefawugijedivusasub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad08712b-e8fe-47a0-af12-b58fafedb0b5/eventide_h9_harmonizer_plugin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04065677-0752-4170-9b8c-5d9eb31bfaa7/how_to_think_like_leonardo_da_vinci_by_michael_gelb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b00adf16-7604-4fe9-8e61-a27d4cbbe254/tezarufesanup.pdfIn PDF document text
    • http://mudowomuxexo.pbworks.com/w/file/fetch/144422955/benvolio_and_mercutio_relationship.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586637d3-b923-4286-9fd8-4b9b11fe6f1e/calendario_tintin_2020_fnac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862cba3b-4dee-4ac9-bc70-89a17c1b30c5/cabelas_gun_dog_gs-8000_training_collar.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_off0000dde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE0 6112 bytes
SHA-256: a83afcaa7658a00201f74e39dad49938fc55d0ba80d03f8513951b3bfe4e15a6
font_01_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 10912 bytes
SHA-256: 31dfe6c4a587d02595f0e2fdc6d1ba7693b55a7da57c444fb8b10396558c7400

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