Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb175205b968c44a…

MALICIOUS

PDF

72.9 KB Created: 2021-03-24 22:13:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1caf97be2d141a6d3564a9a1af66e4c2 SHA-1: b18af0500b2bb9a685831971ef74ee238ac3798b SHA-256: bb175205b968c44a3725cf62c10470f8b0856fc21c6a72ea919908fcb42ceb0f
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'corrugated plastic sheets'. The presence of multiple disposable hosting links and UTM parameters suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=corrugated+plastic+sheets+for+sale+near+me PDF link annotation
    • https://cdn.sqhk.co/kufalavoxig/Hwjce1K/vufokaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_5fdb8aeba2eea.pdfIn PDF document text
    • http://peraxulamo.22web.org/axial_scx10_ii_jeep_cherokee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501385/normal_5fde2eeb14bf2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_6024c5e18bcf7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_6057b46f939f5.pdfIn PDF document text
    • https://cdn.sqhk.co/womafafowix/j3gjXhh/73038864562.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ab25a8b3-4d80-4d4b-93a1-c1347014fa7c.filesusr.com/ugd/8d0191_2d3329d0c6fb4639963516bb76830b0a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e22881-9c8b-4c86-a4b3-f799095f465d/xemenonubakijelanido.pdfIn PDF document text
    • http://zivositad.rf.gd/ryobi_electric_chainsaw_chain_keeps_coming_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ea6c550-db65-45e5-8345-5ceaea7f8e2f/eset_smart_security_8_license_key_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219156a4-f556-4f45-ad91-c8e9d0b38869/wamusosa.pdfIn PDF document text
    • http://gufalejev.epizy.com/fajomapinibubegebo.pdfIn PDF document text
    • https://cb47f074-0476-4434-b381-5672a365cab8.filesusr.com/ugd/c46c8a_5dcf246f27c8409aa3ec6f7e6029c9ba.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_ec48182c92b6415e94274041d2773903.pdf?index=trueIn PDF document text
    • http://wikidupuzok.epizy.com/bts_love_yourself_answer_album_release_date.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_b9d4e57bd7354f6e97ef08217b0a2672.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d0a29b-07b6-4089-afcd-f92b9d47532e/how_to_clear_codes_on_maytag_bravos_xl_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6795b43-d580-461d-93de-2ed0d6faa185/manual_settings_for_sunset_portrait_photography.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7d922c7-5588-4611-888b-166686b917d0/used_us_military_uniforms_for_sale.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_f05b0ab55b9c4026b7fc5c8c1d61a12a.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_off0000da9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9A 5476 bytes
SHA-256: 958ec1858393a35b646a1f994ae13bb806cb0bc492c3e6562086f80be4e070cf
font_01_sfnt_off0000ed10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED10 11620 bytes
SHA-256: 2448d81e461719b20afc93853c55dfdc10dcde7575097625ac30bff0414e62c6

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