Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcca30a5bd9613f7…

MALICIOUS

PDF

76.6 KB Created: 2021-06-04 15:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b7346a0d204252debce457052dffcf76 SHA-1: 2586bef4cfd5c62058e864f82ff9695e206e1ff0 SHA-256: bcca30a5bd9613f7065e5753c989efd1fba629ef6460ed2a2388398379e2e1e1
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The primary lure appears to be a search result for "what is limiting and excess reactant", aiming to trick users into clicking through to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pistant.ru/pbw?utm_term=what+is+limiting+and+excess+reactant PDF link annotation
    • https://genaxixa.weebly.com/uploads/1/3/1/4/131437685/xofasotutovaza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5ffa1471bb327.pdfIn PDF document text
    • https://bogemokized.weebly.com/uploads/1/3/4/3/134386998/finumazis.pdfIn PDF document text
    • https://zepemotofilizag.weebly.com/uploads/1/3/5/3/135399015/fubixetamagozo-nesezapeto-fexubamu.pdfIn PDF document text
    • https://lafetewefovizav.weebly.com/uploads/1/3/4/3/134385578/7f683858ec4a.pdfIn PDF document text
    • https://welajelozasap.weebly.com/uploads/1/3/4/6/134695810/vafuwagababol.pdfIn PDF document text
    • https://fozunisomizu.weebly.com/uploads/1/3/4/6/134666093/nudogiboxevo.pdfIn PDF document text
    • https://derejesi.weebly.com/uploads/1/3/4/3/134388634/2328875.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370055/normal_60083c2271a28.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/b5e30cad5f.pdfIn PDF document text
    • https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/1654554.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/99c9735d-be9c-4ac6-a094-dddabcf24ccb/surfboard_sb6141_led_lights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb95f659-d45a-4079-ab2c-f403e4a87ab2/how_to_value_carnival_glass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a87cd8c-8b95-4932-bd9a-bd5681db1d58/wirajapuxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d70b626b-7cda-4df5-8948-75dd3634049c/7362823679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/238d7c0f-dac5-4640-ae62-9d4cd59648da/sakeziwoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa0f5937-fdc7-4a4c-ad1b-21cbe82ae965/difference_between_standard_form_and_factored_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b33e2c9-7af4-4428-a54b-3241f6cd8690/what_is_the_best_definition_of_research_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6929012-0d58-4c40-a9bc-ec3a0290912c/swann_security_camera_power_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1f7aa4-055b-4c98-847c-07c0bf5562c5/wosudufonuludubufupitajam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9607d653-57e4-4c81-8a48-67cb9feebc22/kk_fit_bulking_program.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11078aa-71c3-4dc0-a8c1-acabe4923060/mibuwetiwagutamon.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC19 5436 bytes
SHA-256: f2e08ae353419ecb5d7aa90b3b030ee1fe28a285c4ae7c5f4850258697361846
font_01_sfnt_off0000fe76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE76 11256 bytes
SHA-256: d94e22b9261c12037024dc9a99c31ab8f384d554f839dcd3af9c5fe6e01d84fd