Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e33fd8aed200714…

MALICIOUS

PDF

77.1 KB Created: 2021-06-02 05:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 44f88bb53a4358d3c8a5a5ce7ed69ba9 SHA-1: 66a19505c89a5282cf933e234d0a9196e3e078fc SHA-256: 0e33fd8aed200714e0685d927940309b925fc2cfbc03b377291b622b2ff1849e
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, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or malicious redirection attack, likely leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/pbw?utm_term=iphone+xr+sim+card+tray+replacement+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5fe7a95896b7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379961/normal_6044740357b5d.pdfIn PDF document text
    • https://tomolipuxoris.weebly.com/uploads/1/3/4/7/134708775/vobado.pdfIn PDF document text
    • https://nunesevafarub.weebly.com/uploads/1/3/0/8/130874378/salazazitijuve_nexubukozezi_jigozulitujag.pdfIn PDF document text
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/7961866.pdfIn PDF document text
    • https://wixetaduzem.weebly.com/uploads/1/3/4/4/134471786/b75557.pdfIn PDF document text
    • https://zeduwekikozive.weebly.com/uploads/1/3/6/0/136050246/vekujusagazaz-zezuwetin.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/nukemub-pemipewaxemo-riduvigakes-pexesuledozor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419626/normal_602ad446a5b87.pdfIn PDF document text
    • https://disefiduwixa.weebly.com/uploads/1/3/5/9/135981448/rozopuxapuk-ziwebatajisago-ranup-jijivuzu.pdfIn PDF document text
    • https://zogetesiwuxiwa.weebly.com/uploads/1/3/4/4/134487963/ganudulowe_mexabedap_nuzoxo.pdfIn PDF document text
    • https://tizalabap.weebly.com/uploads/1/3/0/7/130775180/f6d8196ad0651b4.pdfIn PDF document text
    • https://lovuvolix.weebly.com/uploads/1/3/4/8/134866108/kivube_jukabikekixalu.pdfIn PDF document text
    • https://jijoromosuw.weebly.com/uploads/1/3/4/7/134714512/bawepefajepof-ketirezatu-videmowuvi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502920/normal_6006bcb522f77.pdfIn PDF document text
    • https://lemosipezo.weebly.com/uploads/1/3/5/3/135326275/5199526.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5fdd8af7dd5a9.pdfIn PDF document text
    • https://rigozanukamesok.weebly.com/uploads/1/3/4/5/134508669/931cc7.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://duziruromeja.pbworks.com/w/file/fetch/144489315/how_to_find_the_area_of_a_trapezoid_grade_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6dab9d-d822-44b7-95ee-e7ae9b78e2f4/88588088827.pdfIn PDF document text
    • http://lokiboz.pbworks.com/w/file/fetch/144475113/salary_expense_accounting_entries.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4278e5a4-f131-47a7-82f7-c5af517828b8/tezekuxaserufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b4da8d-dcc7-4281-a65e-c1f0fe6f73ac/marireratedefajojir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/903f6e3d-a2b4-4bdc-a4f4-1f8d7810e1df/togajukema.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_off0000e46f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46F 5208 bytes
SHA-256: 4d31a1cedb07b1a57492f1f5f0488b38c218290261635e922e5abaca11123b03
font_01_sfnt_off0000f5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F0 10116 bytes
SHA-256: 993a488f9cc53d24294ee6619f873190eca70430119d588a3e1ebc8ae10f512d
font_02_sfnt_off00011889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11889 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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