Malicious PDF — malware analysis report

Static analysis result for SHA-256 a05fff48ac01c849…

MALICIOUS

PDF

87.9 KB Created: 2021-02-15 10:21:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 227724030918f52b4957813cab088be2 SHA-1: 6720dcf4e4e077cd35a43b1d6e6f863be415dda4 SHA-256: a05fff48ac01c849e1c20e28905334b9dd6841cf11036a343fe125054db5d260
136 Risk Score

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
  • 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://bologen.ru/123?utm_term=mann+buddenbrooks+pdf PDF link annotation
    • https://cdn.sqhk.co/janawezexoj/NjeXT1k/84825508536.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/haYg07G/dujudaxufotadezofa.pdfIn PDF document text
    • http://all-casino.xyz/jar_of_hearts_piano_sheet_music_easygfn30.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/jfjiBai/88914808218.pdfIn PDF document text
    • http://siankaanmexico.com/16275675955m1srb.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/BlVgege/1159773916.pdfIn PDF document text
    • https://cdn.sqhk.co/tobajizil/PgjKheW/the_factory_kitchen_yelp.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/boximarojamepukopilofeaw8.pdfIn PDF document text
    • https://cdn.sqhk.co/dibitarebizu/hi47hjT/abcmouse._com_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tejilunuf/dggiigd/zipufek.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/jjc6gjj/7708269086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_601535f35b18d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/50776086985.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/low_fat_low_sugar_diet_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/information_classification_labelling_and_handling_guidelines_nsw.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_off0001186a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186A 5212 bytes
SHA-256: e2c29cb6edac16905a18f25edaf587d21d8d32f9b5efcdfbc4e7864efe27c57f
font_01_sfnt_off00012a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A38 12048 bytes
SHA-256: de623245cdf1e5966e253c7c6a10d4c6dc2cdfac383649fe1d5fc3a5cf84052b