Malicious PDF — malware analysis report

Static analysis result for SHA-256 b226a5d29a31cfda…

MALICIOUS

PDF

78.5 KB Created: 2021-05-12 04:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f0777d37fd54c840884bcd01f2b617f7 SHA-1: cf28edd93a6025f352aed5aa93875e213b7022ca SHA-256: b226a5d29a31cfda8e51c02abe5b7737002c0c2101b11455e8ee6c4e4dd9f48a
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a link farm heuristic, indicating an attempt to redirect users to external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a social engineering attack to drive traffic to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=white+rodgers+non+programmable+thermostat+troubleshooting PDF link annotation
    • http://lojapidabud.mypressonline.com/ornament_and_crime_manual.pdfIn PDF document text
    • http://tuxiwos.iblogger.org/nottingham_bluecoat_school_uniform_shop.pdfIn PDF document text
    • https://wakavofidokevi.weebly.com/uploads/1/3/2/6/132681750/vupunuzi.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/9196bc253bca784.pdfIn PDF document text
    • http://kazaxofenew.iblogger.org/irrigation_engineering_and_hydraulic_structures_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://revodez.myartsonline.com/neuroendocrine_system_in_insects.pdfIn PDF document text
    • https://c63359c4-faa5-40af-ad11-254ddd3d100c.filesusr.com/ugd/838c33_59c5d859b86b47d793e37d2745b780fd.pdf?index=trueIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_cd804382ec7346348d0d4b2cdef2cf6c.pdf?index=trueIn PDF document text
    • http://gofemotomikuroj.epizy.com/67530391451.pdfIn PDF document text
    • http://tuwigugu.rf.gd/cengage_physics_for_neet.pdfIn PDF document text
    • http://lofalag.epizy.com/rezelimotamepi.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_08bc4f3d34c24f5193a3654cc07a3d2c.pdf?index=trueIn PDF document text
    • http://tafupudininidag.rf.gd/if_i_change_my_address_with_the_post_office.pdfIn PDF document text
    • http://nupowabel.rf.gd/runofap.pdfIn PDF document text
    • https://ce099f17-eb12-430b-a452-8d789b3ee5a8.filesusr.com/ugd/aef5b7_945a3661fe55440ea701a1cd6668c652.pdf?index=trueIn PDF document text
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_6bd68668c85144f48ddd2861a8dad210.pdf?index=trueIn PDF document text
    • http://duvufewitopemaw.rf.gd/warovekawiwogalemi.pdfIn PDF document text
    • http://famebod.epizy.com/zivatenulijexutiwa.pdfIn PDF document text
    • http://tokavazeweg.epizy.com/indraprastha_school_paschim_vihar_admission_form.pdfIn PDF document text
    • http://poxazaxu.epizy.com/cashier_cv_sample.pdfIn PDF document text
    • http://katibabiziv.epizy.com/87393457758.pdfIn PDF document text
    • http://tetomor.rf.gd/film_vaaste_full_movie_sub_indo.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
font_00_sfnt_off0000e650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE650 5408 bytes
SHA-256: 5314dc0a589fed552223254cc21ee6bc58bd9578872821208b7dddb49b9cbb6a
font_01_sfnt_off0000f88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88C 10980 bytes
SHA-256: cefb6dc417c8ea1d873b0243999ae18629b919384a80f35e5dfa2d44f0f02d3e
font_02_sfnt_off00011e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E11 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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