Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77d12b6720fa5b1…

MALICIOUS

PDF

74.4 KB Created: 2021-02-28 12:30:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 497cb69d65c4e9306980ab5fa935704b SHA-1: e82f65116bf1957cb1e0049f3b88c16e522d1dc8 SHA-256: c77d12b6720fa5b1932dfe3ba79d7684750c7fe100f98abfe701e3345adc9600
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=what+is+the+lord+of+the+rings+about+quick+summary PDF link annotation
    • http://gokutep.22web.org/beginner_writer_tips.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/0a0326c.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/1b91bad8f7.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/5iaihAj/bike_race_free_2019_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/jIpEGgi/393_wordsworth_ferndale.pdfIn PDF document text
    • https://wosixuluwur.weebly.com/uploads/1/3/1/0/131071196/nidekitunetid.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/simple_python_programming_questions_for_interview.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/89871460751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xamilelamijokuk.rf.gd/the_natural_rate_of_unemployment_equals_the_sum_of_those_who_are.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/gavevorepumi.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/alan_walker_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/inference_worksheets_11th_grade.pdfIn PDF document text
    • http://pitafexe.epizy.com/kixazoxo.pdfIn PDF document text
    • http://pukokudew.epizy.com/hernia_inguinal_2019.pdfIn PDF document text
    • http://jemekeluvakowop.rf.gd/binipumozumo.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_off0000e4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FB 5880 bytes
SHA-256: 3f1ed9d873aec966e6102df819e16604f3e7903e2f6604926f4269be8a45e268
font_01_sfnt_off0000f8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E2 10380 bytes
SHA-256: 2d592365e547d261565a7be2fb7b7aa4e5f5dcf01ca7ee34b4594a34a791c27c