Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1dcbf59c8da7137…

MALICIOUS

PDF

72.7 KB Created: 2021-02-16 16:48:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0482aa208528d9d68598f410e4310c43 SHA-1: 1f7749582a6e1b94d6fbfe84de760be2bfebe30f SHA-256: a1dcbf59c8da713783be90241fd3cdb2068990e84307da12c5aca015f1b56e26
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.
  • 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://crophysi.ru/wb?keyword=how%20to%20read%20puppy%20food%20feeding%20chart In PDF document text
    • https://ronunute.weebly.com/uploads/1/3/1/0/131070227/a153c9f5f7fe64c.pdfIn PDF document text
    • https://sekotujuf.weebly.com/uploads/1/3/5/9/135960234/5be316aed6666.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/lowojeri.pdfIn PDF document text
    • http://pametuwujikedag.iblogger.org/paxoduburoxagunaru.pdfIn PDF document text
    • https://dobojadu.weebly.com/uploads/1/3/2/7/132711966/bugirezu-vanurusaje.pdfIn PDF document text
    • http://dasiroxejipi.22web.org/lotikobaki.pdfIn PDF document text
    • https://binolopokam.weebly.com/uploads/1/3/1/4/131484395/264815.pdfIn PDF document text
    • https://sipitajopidegol.weebly.com/uploads/1/3/1/4/131453448/1436924.pdfIn PDF document text
    • http://vusikudezewoteg.iblogger.org/electric_circuits_physics_classroom_worksheet_answers.pdfIn PDF document text
    • https://medotufise.weebly.com/uploads/1/3/4/5/134512565/2661976.pdfIn PDF document text
    • https://ritewelikuwu.weebly.com/uploads/1/3/4/4/134493798/gewuduzubawixex_rosekowapaxe_pukodu_kifunevelidumi.pdfIn PDF document text
    • https://seporulakokifo.weebly.com/uploads/1/3/4/5/134590723/f319f5898.pdfIn PDF document text
    • http://jajifejeda.22web.org/sadawojowigowagada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xatamiv.rf.gd/rabumak.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/futov.pdfIn PDF document text
    • http://jubadoloje.epizy.com/budget_process_in_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/95436373569.pdfIn PDF document text
    • http://kupuwatuz.epizy.com/95279834477.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_off0000e09c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09C 5364 bytes
SHA-256: 7e28d6475362cfc79e188f25c6d4f91dd18b05eeeaa81174185dd560cfb7cec0
font_01_sfnt_off0000f2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F2 10260 bytes
SHA-256: cb92d484c7cb3b134b9efe1c8ef1e1a0ca7e650f89209f8ae99b8d95df085f31