Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3aad6ea570610da…

MALICIOUS

PDF

81.5 KB Created: 2021-02-10 14:42:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a0b319eaf3277cde80e6fce6d1557ad9 SHA-1: 70777d5a5219bdc78c3f52a1e26a1f622c0d1bb4 SHA-256: b3aad6ea570610da6a234e4a1ca2743fb7080b9572ad38d6ec8172eaff323da1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/123?utm_term=google+sheets+round+down+to+nearest+10 PDF link annotation
    • https://cdn.sqhk.co/malevevipali/a5heShh/pedal_afinador_boss_tu-_3_chromatic_tuner.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/igKD2Y4/69587141200.pdfIn PDF document text
    • https://cdn.sqhk.co/simikimira/hbgcjaz/gun_club_2_apk_full.pdfIn PDF document text
    • https://lijupumo.weebly.com/uploads/1/3/4/4/134496400/bagejojimurijitovus.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/hcEjdgi/77519759630.pdfIn PDF document text
    • https://cdn.sqhk.co/pabukerofo/0spjjat/toy_warehouse_sale_mississauga.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/ijhiivv/playmobil_ghostbusters_car_ecto_1a.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/ciigfie/disney_glory_road_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445881/normal_6005191935bde.pdfIn PDF document text
    • https://jebelobuf.weebly.com/uploads/1/3/1/4/131452997/rovop.pdfIn PDF document text
    • https://cdn.sqhk.co/mofekuma/jigqhdL/wibar.pdfIn PDF document text
    • https://cdn.sqhk.co/zirixegip/fgDHE6o/truth_or_dare_old_movie_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445541/normal_5fdb57a9ccaeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gazitif/36749560864.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/bovadaralafupavawufuxus.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 6744 bytes
SHA-256: ffeb89eaad713c9717385028f79c9757067aafb2c2382ea8cbab0e6efe35a425
font_01_sfnt_off0000f626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF626 5404 bytes
SHA-256: 75b560a69560069ceca60aeeec8cd2b2ea336be4f8025cb7dbd11fae3a8df88d
font_02_sfnt_off0001088f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088F 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off0001111c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111C 11452 bytes
SHA-256: 049f00c25575b2df6b0a3742190342b580570096c7da1c779de80028891e0cd2

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