Malicious PDF — malware analysis report

Static analysis result for SHA-256 de14d5c6bcdf81fb…

MALICIOUS

PDF

73.4 KB Created: 2021-02-25 04:48:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e98163614833275a04f228fef4c015ac SHA-1: 4d799193a0bcb7cf5f841384d94bd109430c7289 SHA-256: de14d5c6bcdf81fb2361888d204cdcbc609db17025da45a2294db9bad716c223
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, appears to be a lure related to 'Bible verses'. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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://jottigo.ru/award?keyword=bible+verses+related+serenity+prayer PDF link annotation
    • http://kamikofonem.mygamesonline.org/java_examples_in_a_nutshell_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459059/normal_5fe436bd45392.pdfIn PDF document text
    • http://dajexori.mypressonline.com/safety_measures_in_construction_site.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/best_dance_music_in_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5fc64b26093c5.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/fMjUYdf/49503431455.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/YIZuGbU/pac_xon_friv_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473030/normal_5fea34574b392.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/24jaEge/word_jumble_answers_in_the_desert.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/best_selling_anger_management_books.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/O4ggRNp/gesunusidud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/how_to_answer_tell_me_about_yourself_in_interview_sample.pdfIn PDF document text
    • http://taxolume.rf.gd/brother_xr1355_bobbin_case.pdfIn PDF document text
    • http://gafodix.myartsonline.com/7823281916.pdfIn PDF document text
    • http://kijijaxozaro.epizy.com/warfarin_overdose_nice_guidelines.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/16266992051.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_off0000e322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 5304 bytes
SHA-256: ce939a9d1c34bcdf5761342c8f8e25a75ab26b841550d283e9f60d79b2470aa7
font_01_sfnt_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 10336 bytes
SHA-256: cf8fe6c2d6e6e2cbf2075ddaa3159c0b74f9aa93b730ed8e635c24c7d9cab037

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