Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88fe0dfc68c19ec…

MALICIOUS

PDF

79.2 KB Created: 2021-04-25 13:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 684b275def635c0d414f825126bc46b0 SHA-1: ee3cc1bbe4abfad54eb26289579bad06a6bb67eb SHA-256: b88fe0dfc68c19ec71ba854ba34376b09dead052a2de01130b423e8b95aa5c80
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The presence of a URL with 'utm_term=cast+away+movie+script' indicates a lure to attract users. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://xezojetit.ru/strik?utm_term=cast+away+movie+script PDF link annotation
    • https://kitomejefu.weebly.com/uploads/1/3/4/1/134108571/bc2ff9547ca.pdfIn PDF document text
    • https://wuvobarapupi.weebly.com/uploads/1/3/0/8/130813490/nexufujuze-wuzawuvunajafa.pdfIn PDF document text
    • https://farevilifowo.weebly.com/uploads/1/3/5/3/135390938/393e95845.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://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_747bb68570fd4b88aadbece7c1316aa3.pdf?index=trueIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_e189aff0d1c840d1a3b4b7c5e707b82e.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_c301d5b9248944d79c6b129269c9f72c.pdf?index=trueIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_d24ec6c197e34cb39cb33c678a5f3679.pdf?index=trueIn PDF document text
    • https://0543556e-e4c1-4a10-86be-78be3fd76ea2.filesusr.com/ugd/2e16aa_dde622f783f24d7d93914b667de9b255.pdf?index=trueIn PDF document text
    • https://17a6c5a8-0587-4adf-8126-5b439e15a62f.filesusr.com/ugd/54bec1_c4d689bfad2f40a494a64a2eff3d169e.pdf?index=trueIn PDF document text
    • https://0c43c058-97b3-435a-b041-a9f001bfa883.filesusr.com/ugd/791d74_c5b9d363c2a34562962cc10ac75456fe.pdf?index=trueIn PDF document text
    • https://67a4337f-2b79-4d04-9c1d-2578c80f4945.filesusr.com/ugd/964009_c139700f25b84af5a210eac3905bb12f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9871d290-bd85-4fd3-9149-d13e8a9bf8ef/engineering_mathematics_with_examples_and_applications_xin_she_yang.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_50334e7472df4f55931ba3b68c7c0ebe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/dowotijetite.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/hydroxychloroquine_davis_drug_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/huawei_themes_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b7ef21-15c4-469a-8dd9-d2ac3cb35816/why_does_my_wireless_headset_keep_cutting_out_xbox.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_off0000eb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB71 5008 bytes
SHA-256: 1566093c157819644e11734a114736bfe1331dc9ae9c5ea37f5a1b4266710330
font_01_sfnt_off0000fc95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 11040 bytes
SHA-256: 24dd835c33acbc2b4c767723d8f869e09e7c7304459fb243a8005e49ddc47345
font_02_sfnt_off000121f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F6 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3