Malicious PDF — malware analysis report

Static analysis result for SHA-256 0345d054e21b5647…

MALICIOUS

PDF

87.0 KB Created: 2021-03-24 21:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c85e4ed502b0be29b596139b11685c32 SHA-1: 48de81855052d46cf9896335d10e73db002c6042 SHA-256: 0345d054e21b5647ceded8abbf60725eb63da9a33b7624117f61cde98334a3d1
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains and link farms, suggesting a phishing or redirection campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself is used to host a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://resalured.ru/123?utm_term=garfield+tamil+dubbed+movie++in+isaidub PDF link annotation
    • https://cdn.sqhk.co/vanewano/gmhfjaG/75580906927.pdfIn PDF document text
    • https://kilejotiwig.weebly.com/uploads/1/3/1/4/131406519/cc7ccc51a.pdfIn PDF document text
    • https://namowabe.weebly.com/uploads/1/3/4/0/134000139/jovazejan.pdfIn PDF document text
    • https://cdn.sqhk.co/nutubuzere/qqOjgGS/baris_dan_deret_aritmatika.pdfIn PDF document text
    • https://fogenidu.weebly.com/uploads/1/3/4/3/134391000/8f71f.pdfIn PDF document text
    • https://xobawaxotax.weebly.com/uploads/1/3/1/4/131453143/xebekegidikamori.pdfIn PDF document text
    • https://sazoxizifa.weebly.com/uploads/1/3/4/5/134505384/adbb452a6f487.pdfIn PDF document text
    • http://domainlimax.xyz/variety_of_living_things_in_an_ecosystem_calledo5wjg.pdfIn PDF document text
    • https://xetizokabonon.weebly.com/uploads/1/3/2/6/132696323/5411035.pdfIn PDF document text
    • http://prequester.online/97208730661d0ufq.pdfIn PDF document text
    • https://niraxonaweza.weebly.com/uploads/1/3/4/0/134000156/bumoziterajun-tarujupari-pigufil-lupovowakir.pdfIn PDF document text
    • https://cdn.sqhk.co/reromiwo/baRagda/memuwegunifulavigufuzeros.pdfIn PDF document text
    • https://cdn.sqhk.co/terupilenu/cIxN6vY/farm_animals_cartoon_drawings.pdfIn PDF document text
    • http://gatorama.space/46480818954u6hr.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/ff24827cecf30.pdfIn PDF document text
    • http://mini-cam-v2.club/yugioh_gx_monstersez7nu.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajura/idgfRzJ/8625607592.pdfIn PDF document text
    • http://sandwichhq.club/26957470402v3vzf.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df039b99-c303-47c2-a00b-7618da36dbcc/takikizifuve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/003521bf-8b93-4f38-870b-317a93b18f6e/hunter_x_core_wireless_rain_sensor.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/annals_of_physics_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/nezuxenow.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/dejuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3608cff3-d11e-4d79-b50e-956bb4e06062/watch_dirk_gentlys_holistic_detective_agency_season_2_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbdca41-2390-4450-8fc0-30df3de15aff/lugojuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b516096-4278-408b-940f-c30c7d1836ec/88505336912.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/jamenufolibukesepiwasa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000106eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x106EB 14024 bytes
SHA-256: 6ee60083d27078f32248b902e144ddc26429b09a5b2e272219c1a3078dca42d2
font_00_sfnt_off0000f506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF506 5284 bytes
SHA-256: 0a9dd4eb4798a4a4825006e5d094452be82123bafbb9aed0db81ad8cc25d294a
font_02_sfnt_off0001291e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291E 10652 bytes
SHA-256: c972ebfb7418464cbb15deee4de1246f9c32a1bdb434a1a17a70a8993d0571eb

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