Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafa72a32979395c…

MALICIOUS

PDF

82.3 KB Created: 2021-03-05 05:45:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7f7610cda6505d3f781900b16b2a4eb7 SHA-1: 4436deae24515c7393fa7b56674b897a8081c434 SHA-256: fafa72a32979395cede67b58800f28b38d54ec5bc62f8ca69fbb29140b704532
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to direct users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users, potentially to a site that exploits vulnerabilities or hosts further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/award?keyword=formato+de+n%25C3%25B3mina+en+blanco+para+rellenar+excel PDF link annotation
    • http://dujekuba.22web.org/forensic_files_dna_dragnet_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/hYjjhgd/siketid.pdfIn PDF document text
    • http://fumerox.iblogger.org/naruto_online_mobile_tencent.pdfIn PDF document text
    • https://cdn.sqhk.co/novujarogoga/5jidid9/kepegewazumifugud.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/Sjgfdox/tomitatavolevavosir.pdfIn PDF document text
    • http://xekumaluvox.iblogger.org/neruvogisesedaxux.pdfIn PDF document text
    • http://jowakemanek.iblogger.org/17749949529.pdfIn PDF document text
    • http://munupozazuwo.iblogger.org/98259499990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_eb486737dfde4f3c98ffeb34df4832c7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac2a500-2e78-48a8-83fd-4d1a9ad4ee69/smart_watch_mi_band_4_flipkart.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_27a0620d36ff45f3b602cdeb471e6d79.pdf?index=trueIn PDF document text
    • http://zixupav.rf.gd/digagewokamuka.pdfIn PDF document text
    • http://xawavejemefo.epizy.com/understanding_movies_13th_edition_chapter_9_summary.pdfIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_3a9685f2c79a4adf89e7b28bcc726af5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6f04c83-c4ea-42f6-a270-e71e2b009294/vuvovufudapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b533b4-b048-4dcd-8d73-352404bc1582/wobajisesoxexo.pdfIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_7c53dad0594440318533585671fc1210.pdf?index=trueIn PDF document text
    • https://2906c4fa-6ff4-475b-b288-a86ede128d70.filesusr.com/ugd/1b0481_a152cdd018d34bb5b00e5ab53aa24526.pdf?index=trueIn PDF document text
    • http://rimamosapike.epizy.com/rigveda_samhita_in_kannada.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_2ef544553f9e40b29a9798de70823819.pdf?index=trueIn PDF document text
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_817d5464fe6641909e403714eb446263.pdf?index=trueIn PDF document text
    • http://fojisar.rf.gd/6281810171.pdfIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_aaec3e2636ef49d0983aea320ea54fe0.pdf?index=trueIn PDF document text
    • http://fetevatakipip.epizy.com/70277817540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d30b367-bb36-4958-97bc-54afa9bd5132/lomemeb.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC70 5340 bytes
SHA-256: 8eee8977a18e225faac777886d03a73645b28d808d5cf37bb6a3dffcecc4943f
font_01_sfnt_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 11520 bytes
SHA-256: 485440baee2fa251abf708b3e94ffcad582062a7f80d5965b38f597d5b2505d3
font_02_sfnt_off0001241a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241A 16060 bytes
SHA-256: d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc

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