Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb45c90446d32e4f…

MALICIOUS

PDF

75.7 KB Created: 2021-04-15 19:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 15dc420cdfe7706c459689a2edea6349 SHA-1: 251dc9a1ab6ecc7d5b55e0bf2030b8d3133d51e2 SHA-256: eb45c90446d32e4f5011819b1fd46d8f92e64ef0b752a3b12e0fcc5cbcca38a4
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate an attempt to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/strik?utm_term=thermo+king+codes+25 PDF link annotation
    • http://presalle.xyz/unlimited_motorsports_flemington_nj9hczt.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/549fea37.pdfIn PDF document text
    • http://wigosixozem.mywebcommunity.org/vukibetevot.pdfIn PDF document text
    • https://faxigokoge.weebly.com/uploads/1/3/0/7/130775726/e21428a030f1.pdfIn PDF document text
    • http://healsmall.space/how_many_wings_of_fire_books_are_there_going_to_beq7u5j.pdfIn PDF document text
    • https://begobaxu.weebly.com/uploads/1/3/5/3/135336669/sofejazurufi.pdfIn PDF document text
    • https://terekutididir.weebly.com/uploads/1/3/0/9/130969195/9711798.pdfIn PDF document text
    • http://ozalupa.space/10emew5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_604920b493e75.pdfIn PDF document text
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/vasivutag_paralemis_veduvikiruwuwe_movisi.pdfIn PDF document text
    • http://busurman.space/bovirivexexutetituma4xyi5.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/tidowok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482426/normal_5fd6d157781cf.pdfIn PDF document text
    • https://guladusive.weebly.com/uploads/1/3/0/9/130969442/8072338.pdfIn PDF document text
    • http://lovemecompletely.com/78526765944xhjed.pdfIn PDF document text
    • https://mifopezuzata.weebly.com/uploads/1/3/4/4/134484464/fa4c358b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8bd0dbf5-62e0-4684-a95a-1d9666dfa34a.filesusr.com/ugd/e71694_d4457d956c35490f8528b092017d6006.pdf?index=trueIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_babbbc9242af40c3a7a9a6a14b9a553b.pdf?index=trueIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_d8bb9e337d6f48ebb0f25f2a2b0febe9.pdf?index=trueIn PDF document text
    • https://c1ab63b4-4781-4901-abeb-f581ed41d26f.filesusr.com/ugd/b44917_994fca52cdca461b928688c7807f57ec.pdf?index=trueIn PDF document text
    • https://53ee2ee6-42da-4c96-954f-60f726bc8d53.filesusr.com/ugd/de2744_797b5ce8fe3547eea51e2f04deaf7eab.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7C 5380 bytes
SHA-256: f37749fb18f912739b2806df09a72419071e2ac7bd8e14bed983c50c8abef260
font_01_sfnt_off0000fcab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAB 10976 bytes
SHA-256: a0cf28a45eb6cee70739df54d19885941c5ddaed0cc3a446a61ecfb16bde9114