Malicious PDF — malware analysis report

Static analysis result for SHA-256 e94f0b07846e9082…

MALICIOUS

PDF

81.5 KB Created: 2021-03-19 22:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f477104911d1dee69815c013c689345b SHA-1: 1506cbc7e6ad48e099422f9b2432363771418ae1 SHA-256: e94f0b07846e9082151a701bd4cd29623268d302bf91c59c51812ae6fd4c5d3e
196 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many of which point to algorithmically generated URLs, indicating a likely attempt to distribute phishing content or redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://baarspo.ru/wix?keyword=jbuds+air+sport+user+manual
    • https://zelosadu.weebly.com/uploads/1/3/1/3/131379518/pamete.pdf
    • https://mivujekosos.weebly.com/uploads/1/3/1/6/131637271/bezuwatufoleraruke.pdf
    • http://privateguardingserviceagainstdanger.site/756441828svxvu.pdf
    • https://razotipelemato.weebly.com/uploads/1/3/0/7/130738732/5d20e4.pdf
    • https://lozusometuzasop.weebly.com/uploads/1/3/4/7/134741376/tajenezif-dugemibadere-milar.pdf
    • http://shopbest.online/29279527634foa5u.pdf
    • https://dulebepil.weebly.com/uploads/1/3/3/9/133999512/3873913.pdf
    • https://mefixakiderix.weebly.com/uploads/1/3/4/3/134319494/liwajamuwewuga.pdf
    • https://mobajexiv.weebly.com/uploads/1/3/4/4/134455683/4f570f4b6.pdf
    • https://nebavorod.weebly.com/uploads/1/3/1/4/131406600/memewutoj.pdf
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/8572008.pdf
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/8165561.pdf
    • http://form-lnstagramcopyrightservice.com/william_faulkner_writing_style8w1re.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nokiva/hospital_building_3d_model_free.pdf
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_3c21de12ba0041cba53963b05ad7ad6a.pdf?index=true
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_badf3f1740364663861c457a5fad9816.pdf?index=true
    • https://s3.amazonaws.com/tawovojo/what_does_enthalpy_mean_in_chemistry.pdf
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_c1c73b4651f2475bb35aac8a1de64023.pdf?index=true
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_48a5ce825bdb4f5ca823729728de00a3.pdf?index=true
    • https://s3.amazonaws.com/dikobepibelun/is_buying_penny_stocks_worth_it.pdf
    • https://s3.amazonaws.com/bisegilupuf/51341885105.pdf
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_799b5fb05158478e95afe339c6a110f2.pdf?index=true
    • https://49b821e7-ee7e-41b4-809b-d0417b8c1ddf.filesusr.com/ugd/927743_7e655575b3e346d4ab18644c142e1bd5.pdf?index=true
    • https://s3.amazonaws.com/rujimidujek/mergers_and_inquisitions_interview_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001012a.bin
7921c199cadff732cdd78023c1d355bc580ea07f42788a93a5ac2ff3c4b189a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1012A 5236 bytes
font_01_sfnt_off000112d0.bin
de4e35c073fabb282613dadcbc7fb359effeefc4579472e3651c5b9495cf90b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D0 11076 bytes

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