Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1db6ad606d8b458…

MALICIOUS

PDF

94.6 KB Created: 2021-03-02 00:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f098cd389ff006a989232a44c7b5ca47 SHA-1: 69d7c1f648aebd727d51108c22523db16a680c2e SHA-256: b1db6ad606d8b4586f191c975be77dfe8c2c6c8befc645311bce565c5c07c55b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests malicious intent, and the ClamAV detection confirms this. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to harmful sites.

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://fokemale.ru/strik?utm_term=2014+honda+accord+ex+l+service+manual PDF link annotation
    • http://ziponep.22web.org/71799014706.pdfIn PDF document text
    • https://cdn.sqhk.co/suwinodujeja/M9gjhg8/jubonuber.pdfIn PDF document text
    • https://cdn.sqhk.co/gedofovel/iGhhAgi/cool_ringtones_for_your_phone.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/87jhgd3/tiktok_songs_youtube_clean.pdfIn PDF document text
    • http://pexawegowe.mywebcommunity.org/reflexive_verbs_spanish_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/libobivole/i2ifeii/loredorazawogizopaxozur.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/giBaJjd/macbook_keyboard_change_keys.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/7ghZheP/hungry_shark_world_movie.pdfIn PDF document text
    • http://tovinane.22web.org/60255265184.pdfIn PDF document text
    • https://cdn.sqhk.co/karelevo/ichdnhg/rifomixatep.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/iejijbL/jazefoxurinilotula.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/uglys_electrical_reference_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/igjdjjk/xukebutifine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lajirobodogew.epizy.com/71110812687.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/use_dlink_dsl-2750u_as_wireless_repeater.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/security_analysis_and_portfolio_management_textbook.pdfIn PDF document text
    • http://demuremapinob.epizy.com/creative_resume_template_word_doc.pdfIn PDF document text
    • http://tupibamogowoful.rf.gd/69435990620.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/android_watch_app_store.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 5428 bytes
SHA-256: fe0a4943bae2ba3e803c3aa2c3817206205b2a96e41ed29103ed55abfa471f8e
font_01_sfnt_off00013b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2F 10404 bytes
SHA-256: 2e01c3db537822bc9dacaaaddabc49d8f83e690d5a6ae626be945aa89712df97
font_02_sfnt_off00015ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ED2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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