Malicious PDF — malware analysis report

Static analysis result for SHA-256 546b90c41b9eadb5…

MALICIOUS

PDF

209.1 KB Created: 2021-03-16 19:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cee31f08387b16451260202017ac0d5d SHA-1: d1c1c80622789711d2fbfcb3853e18f2fe6bca98 SHA-256: 546b90c41b9eadb576ca7e87f26456497af81203faa1506ab35eed60d5600142
136 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with the primary one being an SEO redirector designed to lead users to phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the PDF structure and embedded links suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9696

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
  • 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.
  • 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://seumenha.ru/wix?keyword=adding+friendly+numbers+worksheet PDF link annotation
    • http://rabisoluvilava.iblogger.org/wetapo.pdfIn PDF document text
    • https://tupivoxutod.weebly.com/uploads/1/3/4/4/134467409/tegigev.pdfIn PDF document text
    • https://cdn.sqhk.co/kupulifip/e6Mjgha/vagefevuzavigod.pdfIn PDF document text
    • https://cdn.sqhk.co/tazofexoz/hhcipgg/adventureland_inn_campground.pdfIn PDF document text
    • https://zupakikaxabu.weebly.com/uploads/1/3/1/3/131380404/rabifalemal_nurojebila_malusukiwububo.pdfIn PDF document text
    • https://cdn.sqhk.co/sekijebasazi/cjbBdhh/modele_attestation_suivi_de_formation.pdfIn PDF document text
    • http://dagomakiluje.iblogger.org/wagner_control_spray_250_handheld_hvlp_paint_sprayer_reviews.pdfIn PDF document text
    • https://zikawudewodag.weebly.com/uploads/1/3/4/5/134585044/c4392.pdfIn PDF document text
    • https://sezowizubuv.weebly.com/uploads/1/3/0/8/130874308/6805399.pdfIn PDF document text
    • https://cdn.sqhk.co/wenoxavawo/7Ap2oih/last_pirate_island_survival_guide.pdfIn PDF document text
    • https://divakifemomo.weebly.com/uploads/1/3/5/3/135311574/54b689c3be21.pdfIn PDF document text
    • https://jevebuna.weebly.com/uploads/1/3/4/5/134594548/5b9df10.pdfIn PDF document text
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/tonoxokuvanot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_6658570e43934c709ba1072cfd87ed2e.pdf?index=trueIn PDF document text
    • http://pubemoxux.epizy.com/37998856189.pdfIn PDF document text
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_811baba6b38444479fe4667c36c00717.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_95053b9efee946909ad2d1a3c0bd61d3.pdf?index=trueIn PDF document text
    • http://kesobikifa.epizy.com/adobe_air_uninstaller.pdfIn PDF document text
    • http://nibuneb.epizy.com/how_fast_is_a_4.3_mercruiser.pdfIn PDF document text
    • http://ralivapoked.epizy.com/is_nikon_d3400_good_for_beginners.pdfIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_937fd9881a894df29b8d2e8230604043.pdf?index=trueIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_7376390cfc8249aebf83d92616771aa2.pdf?index=trueIn PDF document text
    • http://gaxijejazaxedaj.epizy.com/visiting_card_ai_format.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10837 161076 bytes
SHA-256: efe4fe66dad32d36b26f0b930b3eb25ad781eba3cf194b0ef455cb9f014678fa
font_01_sfnt_off0002e3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3BB 5500 bytes
SHA-256: a28edf2fd742b75fb9aead6266b251ab7fe640ee205eb804cb092622d0ca70f1
font_02_sfnt_off0002f661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F661 10936 bytes
SHA-256: 7cd0d8dafc6c145e7561f85f1635d5c9f855f837182376e6740e6e03d047740b
font_03_sfnt_off00031bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BD2 17248 bytes
SHA-256: b9a9008b41ba29903549c3d23da994fbedfc81a19e6f45e7e3ca08ca6640df9d