Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6ad8f8c3d6b807…

MALICIOUS

PDF

83.4 KB Created: 2021-05-19 05:49:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2a117747f2779b85d72f0ce94aedc481 SHA-1: 1a040cdaa8f55ced38eaec4426e87b5083ecb498 SHA-256: fa6ad8f8c3d6b807be085b78244cd814b900a64cd7c73e0a6c2bf406ed01258b
206 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains keywords related to pandemic benefits, likely serving as a lure. The presence of multiple external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious websites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://nipisod.ru/strik?utm_term=will+pandemic+ebt+be+extended+in+nc PDF link annotation
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/4429302.pdfIn PDF document text
    • https://badobokitevobux.weebly.com/uploads/1/3/0/9/130969603/dewipazaxurin-bebepuguna.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/d8c1975d175.pdfIn PDF document text
    • https://vezutubiwewo.weebly.com/uploads/1/3/4/5/134507618/kolobefexalutobuwo.pdfIn PDF document text
    • https://zopewurexolo.weebly.com/uploads/1/3/4/5/134519391/5eb243f25f9ed3.pdfIn PDF document text
    • https://nogonosexenepe.weebly.com/uploads/1/3/4/6/134674491/boduzi-ranaluvofatore.pdfIn PDF document text
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/28ff2dfc61d68.pdfIn PDF document text
    • https://vonebofakakare.weebly.com/uploads/1/3/1/8/131856314/mozijetizenadibudi.pdfIn PDF document text
    • https://zedasadexim.weebly.com/uploads/1/3/0/7/130775923/37364af10f61db0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d0541b0-8e05-4e8f-b823-5c88ff5cbb19/davote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ef0e87-3b01-4f70-bb3e-892a97e68261/40003497569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93ada2a-2cd1-431f-a71f-b419d29f6535/lejudewaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c12b5d-8573-40d2-8985-2a4c222d037a/fifty_shades_trilogy_dvd_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b997474-827c-4e2a-8559-bef77349c7ba/nuzeralaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd075a40-da01-4946-a4f5-618d762d3c4f/74119392010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db52c9c-7473-4cf3-a3b3-ba29e2786c33/79752168528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb16f768-74f3-4d3c-9dac-d162535656fe/zupufozuras.pdfIn PDF document text
    • http://gajefeni.rf.gd/classical_piano_music_book.pdfIn PDF document text
    • http://zonadomafi.rf.gd/jujini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d77859e-fd40-41bb-a788-58f85e8912d2/investing_for_beginners_2021.pdfIn PDF document text
    • http://zifozuwa.rf.gd/guziguwapimodinavenufidov.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10842 5168 bytes
SHA-256: ccf65a723bf18ea172a3ace6d08ae4ecae51da26937ace09d4471046c298b5b0
font_01_sfnt_off000119d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D0 10780 bytes
SHA-256: f518ad68b836ed0972a789c8040124efd61794c8654cc7183f8cfa355c3f2127

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