Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea7f353846a1368…

MALICIOUS

PDF

96.3 KB Created: 2021-03-09 05:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dc441fd1cc1c2d5374e31341cf51768c SHA-1: d3ca8a86354ce5089dc79e0ad4673fcf240f3bb4 SHA-256: 6ea7f353846a1368de593696520b0ade69dab639e7c0d4432862494a92296008
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 pointing to disposable hosting services, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://gimoguvi.ru/strik?utm_term=jean+jacques+rousseau+discourse+on+the+origin+of+inequality+pdf PDF link annotation
    • https://wumaviki.weebly.com/uploads/1/3/0/8/130874148/pitonaji.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/5716129.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/3557070.pdfIn PDF document text
    • https://sawolopu.weebly.com/uploads/1/3/6/0/136049845/2237baa.pdfIn PDF document text
    • https://pesadoxemanuz.weebly.com/uploads/1/3/4/8/134852899/kesenagugudediwu.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/CGhdiic/57377273083.pdfIn PDF document text
    • http://coolstudent.space/90706280499vrzzd.pdfIn PDF document text
    • http://hhizmet.com/jofidilnop0.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/bebikegugasok_nanur.pdfIn PDF document text
    • https://cdn.sqhk.co/melivetipi/aThdxBT/bingo_game_sets_for_sale_in_south_africa.pdfIn PDF document text
    • http://speak4pro.com/zuvitolokadarifusovafe6rm1.pdfIn PDF document text
    • https://cdn.sqhk.co/daluzowinasu/bLfPfhj/spss_amos_22_free_full_version.pdfIn PDF document text
    • https://neveloso.weebly.com/uploads/1/3/1/4/131408616/2573049.pdfIn PDF document text
    • https://riviruzo.weebly.com/uploads/1/3/0/7/130739493/libibezugije-getevebumalo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_13bd55471a0143288cdc50206b00b10f.pdf?index=trueIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_0a38c231d78f47f898dba244b841dde0.pdf?index=trueIn PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_6537702f1ceb474ba7e16e7123ab18b4.pdf?index=trueIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_14e2de73c3ac4045a4dde8c037ef59fa.pdf?index=trueIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_cc197c08706b44e9b82e71d2e46fedda.pdf?index=trueIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_121d75bee1584d89923b47c00c75b735.pdf?index=trueIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_90f0f7280ada411db65d90bbc1603fe8.pdf?index=trueIn 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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE305 7296 bytes
SHA-256: 35273f6be71237517d19f7665084e86e5cf5a3a79fcd7908cb69efe1bc57bed1
font_01_sfnt_off0000fbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAD 5708 bytes
SHA-256: aea04ea279f17a7176e410d5b4ef72650c38fc9663e434212b93efc0ce48a48a
font_02_sfnt_off00010f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F13 6468 bytes
SHA-256: fdf3d43a79dba98a9904c62c90b300c5fc9065eeda7fa71c0ddcd80eec4f2334
font_03_sfnt_off00012053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12053 14724 bytes
SHA-256: dd7f8a443d0dc37df3376f175943ff0cf14758176ab813898dab6dd007614343
font_04_sfnt_off00014d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D54 16604 bytes
SHA-256: aecba53c004a06d2007d9fd88d10f8a8c3174fb353d662b8dc263902219c05bf
font_05_sfnt_off00016459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16459 2756 bytes
SHA-256: bbb126f4de6750971715b9340c66f0dc5c8664ab71e0bac08d4d209841f23f96

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