Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5f5f017cca97b8…

MALICIOUS

PDF

76.8 KB Created: 2021-04-02 06:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7745da14e7dad0c18a5051d931af91c0 SHA-1: 600c5f0b0a937fccd350c0150f3f4822dcc548ef SHA-256: 0d5f5f017cca97b8a773d2b828e40c03833296afaf2aa38ce596cb080331a2ed
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, indicative of a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/wix?keyword=slippery+fish+lyrics+in+spanish PDF link annotation
    • https://weduxuvup.weebly.com/uploads/1/3/4/3/134308116/7050163.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/iewigKo/82942516687.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/jegegjG/phage-_display_peptide_library_technology.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/36161316940.pdfIn PDF document text
    • https://jumirusuvowelu.weebly.com/uploads/1/3/4/6/134632856/587a0d8c.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/zexilimiporujubejo.pdfIn PDF document text
    • https://cdn.sqhk.co/wezopexa/gj2gggh/sport_apple_watch_bands_42mm.pdfIn PDF document text
    • http://wunowixumofe.22web.org/nanutu.pdfIn PDF document text
    • https://sivabujik.weebly.com/uploads/1/3/4/0/134017760/sifapab-woreraxifog-fugifaxaw.pdfIn PDF document text
    • https://satukaxel.weebly.com/uploads/1/3/5/3/135346341/verepis.pdfIn PDF document text
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/tasawaroja.pdfIn PDF document text
    • https://cdn.sqhk.co/kefiruge/ggUiiRx/bivewasopugo.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/32348918807.pdfIn PDF document text
    • https://sazadasixitabe.weebly.com/uploads/1/3/4/4/134404720/59920.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
    • https://uploads.strikinglycdn.com/files/aee77df4-a6db-438e-8312-dfc4c4dda0e5/18612131556.pdfIn PDF document text
    • http://dibulazovila.rf.gd/days_of_the_week_worksheet_elementary.pdfIn PDF document text
    • http://najubizep.epizy.com/87535648263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b19990-976c-4347-ada0-a673fd7da1dc/11458344382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14dec46-e592-49fb-9af1-cb44ba8ad0f5/two_phase_method_linear_programming_maximization.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/april_monthly_current_affairs_2020_gradeup.pdfIn PDF document text
    • http://keberefan.rf.gd/how_are_flood_basalt_formed.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD636 4904 bytes
SHA-256: 516fe88a2c19c4b8fc71489f71a1e6a25190ff90c07573c1c6cc9069e30dc19a
font_01_sfnt_off0000e6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C4 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000ef51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 11680 bytes
SHA-256: 0c35f7cc557f6e1cf1d4f8d17b0ffdaf3cca0bfe2f224305ba83d16e21b32035
font_03_sfnt_off000115a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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