Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce18974ddda4bf21…

MALICIOUS

PDF

89.4 KB Created: 2021-03-22 23:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: db7735a6c5e90fe47f5378e3bb0a4ff2 SHA-1: 2841652cdf571da46a758f62b4074a57e09ed54c SHA-256: ce18974ddda4bf2102136de8b90c1a4fc61c38fb45af3e24e61347a7a7667f10
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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 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://fokemale.ru/strik?utm_term=dell+latitude+e6410+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378152/normal_60536baed1a5a.pdfIn PDF document text
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/6781787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_600f428e561d7.pdfIn PDF document text
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/loninaninumisol-sinaduf.pdfIn PDF document text
    • https://dikurowewo.weebly.com/uploads/1/3/4/8/134893632/zozobudeju-junesevezolop.pdfIn PDF document text
    • http://chestlune.online/why_do_i_have_the_worst_stomach_painsxrcdb.pdfIn PDF document text
    • http://zokazurimila.mygamesonline.org/62848799100.pdfIn PDF document text
    • http://shtampshop.ru/weber_spirit_2_e-310_saleqjfld.pdfIn PDF document text
    • http://kojazunupetip.mygamesonline.org/which_wings_of_fire_dragon_hybrid_are_you.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/how_to_make_a_bridge_with_popsicle_sticks_without_glue.pdfIn PDF document text
    • http://genusadnlo.space/4269412488mcqcx.pdfIn PDF document text
    • http://rezotu.xyz/best_starter_brawler_in_brawl_stars9n96h.pdfIn PDF document text
    • http://mupifojoxur.medianewsonline.com/kibapez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5feb15eaea5ef.pdfIn PDF document text
    • http://gidujoluj.mypressonline.com/fadufifinusige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462056/normal_602d2be88a356.pdfIn PDF document text
    • https://sanepawoja.weebly.com/uploads/1/3/4/5/134579143/zalakabaxedol.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/ocfs_health_and_safety_training_online.pdfIn PDF document text
    • https://balikawe.weebly.com/uploads/1/3/4/6/134659528/kivefikaw.pdfIn PDF document text
    • http://zibikudupe.mywebcommunity.org/47421202459.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
    • http://degevojorak.myartsonline.com/project_report_on_cluster_computing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c311b3-9154-446f-b821-9db75e35d87e/how_does_culture_diffuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66503301-37bf-4b4f-9ee4-591231dee048/76223780399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466a4aec-4aaf-474b-88ce-d0fbd3974c2f/26551180018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93c19b4-056e-449f-9224-d07bd9c1c22b/fofolite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/407a0423-37b4-4129-8884-1645added0b2/xubabarujekef.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 4904 bytes
SHA-256: 2360f2f567e619d3dc3bc9bf6fb17fd29aa6d8ce21420fa98a317ec844f8d604
font_01_sfnt_off000117f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F6 2048 bytes
SHA-256: 554e2c4f29bcd25e928937311aef59cd50fcbf017d7df1f36f8c0471e9d0a229
font_02_sfnt_off000120db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DB 12368 bytes
SHA-256: 933020babdcadb4032c4a4f0ac1be9f98897ff4e793009ed7f1d3a0ef121907c
font_03_sfnt_off00014946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14946 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333