Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e92c77c98e9fae0…

MALICIOUS

PDF

84.0 KB Created: 2021-04-27 04:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e21b89f43f5408e6297db78855908194 SHA-1: 07cb2ce68eceab81d997eaea2468945f3c71b38b SHA-256: 1e92c77c98e9fae0f6b453304d50b1ec6d35d6a042a9809fdc8275bcdbfe4ece
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or SEO manipulation attempt. ClamAV and ML classifiers strongly indicate maliciousness, with a specific detection of 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure suggest this document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://botokaw.ru/strik?utm_term=photosynthesis+leaf+pogil+answers PDF link annotation
    • https://tarutugiwom.weebly.com/uploads/1/3/5/3/135326066/mebikuluxupe_pulodetoxifovav.pdfIn PDF document text
    • http://fuzisadudag.22web.org/22583695412.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/tiwozovene.pdfIn PDF document text
    • https://xopezafetuwov.weebly.com/uploads/1/3/5/3/135314897/6678577.pdfIn PDF document text
    • https://kunuxuzuvedenax.weebly.com/uploads/1/3/6/0/136051690/fb4284d5b9b.pdfIn PDF document text
    • https://fomoxizukewoviw.weebly.com/uploads/1/3/0/7/130739072/fufabuwofako_giwoburigil_kobogafep_zerofef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_6059e88ee78ac.pdfIn PDF document text
    • https://robesiso.weebly.com/uploads/1/3/4/5/134501854/52389867ea56144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_60242c399a2c2.pdfIn PDF document text
    • https://vefapabawi.weebly.com/uploads/1/3/0/7/130740427/93019a8f47da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fd9b30a32f15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_606ba6725712c.pdfIn PDF document text
    • http://nuwevabufa.mypressonline.com/tupugikumo.pdfIn PDF document text
    • https://sorawujij.weebly.com/uploads/1/3/4/6/134671526/tavunixid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bikojov.epizy.com/logic_irving_copi.pdfIn PDF document text
    • http://lobakixadob.epizy.com/currency_symbols_of_all_countries.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/8172296127.pdfIn PDF document text
    • http://wororezijetixa.atwebpages.com/annex_10_volume_3.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/nutiropix.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/42225940662.pdfIn PDF document text
    • http://juludiripo.myartsonline.com/newenufob.pdfIn PDF document text
    • http://rosevasejila.myartsonline.com/zinevapawa.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/employee_payroll_management_system_project_documentation.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_off0000f3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CC 5360 bytes
SHA-256: 022bb4745eb376c02212a1c895114397ffa399f3524a29a3addc076921de05bc
font_01_sfnt_off0001061d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061D 11444 bytes
SHA-256: fd373c394340fc6a69ebac5bf826694a3c173e6a9c423b2a038577b8d823cc6b
font_02_sfnt_off00012d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D54 16060 bytes
SHA-256: 4ef9506ee11a349461550e6b437e3786686b598308a87786035880d16624999d