Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ec58fc087bcc92…

MALICIOUS

PDF

75.7 KB Created: 2021-05-02 08:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bfb30bddfff88c78ca668010a1acd691 SHA-1: a1d6a65485dc03292808eaee76f49da38f5e953c SHA-256: 30ec58fc087bcc92c2f9288be1fb72e2221312d176be0c9eae3df5894994fe63
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous external URLs, many hosted on disposable domains, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The presence of an urgency lure further supports a phishing context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://vilenefex.ru/strik?utm_term=xbox+gold+codes+cheap PDF link annotation
    • http://posurazatux.mypressonline.com/free_online_editor_with_ocr.pdfIn PDF document text
    • http://disukikobofug.22web.org/55962162682.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/bewazafimomewi-kazivafurevuto-parovewefajo.pdfIn PDF document text
    • https://tubuwixufadone.weebly.com/uploads/1/3/5/3/135315283/2126041.pdfIn PDF document text
    • http://rafafezut.iblogger.org/80743211457.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxarivoje.onlinewebshop.net/waste_to_energy_books.pdfIn PDF document text
    • http://sewegijod.rf.gd/kuwapapogulenikesavizi.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_6605b3ff15f64a2e97dd53b55df58c0b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/639c9884-c724-4654-8fa9-f32577406505/what_is_the_most_accurate_version_of_the_bible_in_english.pdfIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_8aa309bb6bcd44148993db046ca631cf.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_30f8089c80d04c9d8850230a81454469.pdf?index=trueIn PDF document text
    • http://xodijab.epizy.com/60221114319.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_e71146e6c45c43d997565a4b1e288ce3.pdf?index=trueIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_e48da6bf405145ab87497caccb6ffbf6.pdf?index=trueIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_b4ceb55fa03f4472ab61b0aa7f4490be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/58878051-8064-4de8-917e-4a1a99a9f26f/percy_jackson_3_story.pdfIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_6fa344d1401a4550afc066d961ea787c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee49205-d340-47d5-9bdd-4705f0382bd2/how_to_get_page_breaks_off_in_word.pdfIn PDF document text
    • http://xitutudatiri.epizy.com/a_haunted_house_movie_2013.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_off0000e9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E8 5424 bytes
SHA-256: be043f076d76ed49e0fbda5660b7393a41425ab1eff5a39590002d7f54048f2c
font_01_sfnt_off0000fc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5B 10972 bytes
SHA-256: ee96f67e4b182ae3da21b0926486997e6fde1cf32b249a5bbd21619b4661aa41