Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29e371e2c5d912a…

MALICIOUS

PDF

80.1 KB Created: 2021-03-30 23:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0faa7d0fe66b4b284241efe158fcb36d SHA-1: 7cd73c6430482bbe463c66c2e71ada31b9f89919 SHA-256: a29e371e2c5d912aa4e96b5d4e38caf57b40cfb865b2afa0cb2949faaa81a1d4
194 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_UTM_REDIRECTOR_LINK heuristics. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'opt out letter for nys testing pdf', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dafemum.ru/strik?utm_term=opt+out+letter+for+nys+testing+pdf In PDF document text
    • http://zaliv2k20wowowowoow.xyz/damizomokesitfxt9o.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/fefijusutusavuxepibeni.pdfIn PDF document text
    • http://nature-ital.space/zijasozaduvulokilivomeswvcu.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/zipibozadujabumedajojofi.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/k7CeoZ5/bamamozavotugi.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/monthly_expense_template_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/weretesa/jehaV5o/drawing_background_images.pdfIn PDF document text
    • http://natiral.space/patton_electric_heater_parts6mkly.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/cxx0hi8/street_fighter_4_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/bagojenul/ifPk83g/vinasatikevu.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/jj6OnEK/75981007094.pdfIn PDF document text
    • http://reflectionss.space/defegosinetilowipizijuzoc76km.pdfIn PDF document text
    • http://ponezivugatub.22web.org/fipud.pdfIn PDF document text
    • http://anarchymedya.com/91959988948eehoy.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/26794309528.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/papa_s_cheeseria_mod_apk.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
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_137c8cbdd9554ec4a6c0b0238699e368.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_50321e41882b423f88d3f6e604854642.pdf?index=trueIn PDF document text
    • https://264aa3b4-28a3-4a3b-9cf4-afdf28ba9476.filesusr.com/ugd/28a074_954e77d22b8d4bdc9558f41d611d8205.pdf?index=trueIn PDF document text
    • http://mujusamufi.rf.gd/love_poetry_books_download.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_a8ff54d5ba2a42498b1f5514e36f150d.pdf?index=trueIn PDF document text
    • http://vugopumoluzunu.rf.gd/vimodizesokanozemir.pdfIn PDF document text
    • https://33edd578-4186-4695-89f3-f56a5a23fc53.filesusr.com/ugd/f17c08_5b43db96423e46e5aa4bb58b155e83bc.pdf?index=trueIn PDF document text
    • http://sikejafomanama.epizy.com/5284838277.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_off0000ec23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC23 5008 bytes
SHA-256: 0c996112bea76ab65458c0c5687824039f6de2feecc9bdf56f4cca88d947d10f
font_01_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 11672 bytes
SHA-256: f07020966c9d3574cebc0163065f895683e8c0202c3824ef643fc306267fc3c0
font_02_sfnt_off000124a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2