Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae1f386ddbb4c1b5…

MALICIOUS

PDF

72.6 KB Created: 2021-02-21 03:54:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4048eba3630d934f89790b6bc54d3fa5 SHA-1: 621386ad957f4fbdcfdd8a6e936e392905792b30 SHA-256: ae1f386ddbb4c1b5152a68c3b77ddda903f76717176bb0405792320ea80c4e3a
194 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
  • 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://crophysi.ru/aws?utm_term=types+of+rock+strata In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409243/normal_602caf5eeaeb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_60186d5042fc3.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/hghgTUc/elite_dangerous_fighter_hangar_finden.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_5ff90b36e2c2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384471/normal_5fc9cb60b9940.pdfIn PDF document text
    • http://idealica-italiauficiale.website/47192577225q8t8f.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/iiPMgjH/japaramo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427097/normal_5fc683c2f3d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_600b643569f91.pdfIn PDF document text
    • http://arfeshome.com/demizuzijavujamexizphvs5.pdfIn PDF document text
    • https://cdn.sqhk.co/puwetudul/VIgcjiw/jaguar_telugu_movie_ringtones.pdfIn PDF document text
    • https://cdn.sqhk.co/mudaxomemut/4ib1hgj/92034225075.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/IhbBfic/kilazowusurozogetiseboze.pdfIn PDF document text
    • http://nibelv.xyz/26551518491ylr2y.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/tobito/medodokovosonugazeledo.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/blowing_raspberries_sound_effect.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwuzerijofa/fapuki.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/25472666535.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_off0000e13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13D 5092 bytes
SHA-256: ccc53ac1feaff6e68736eb16e67e882cd06497f20919bf599ace0eb8799af700
font_01_sfnt_off0000f2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 10204 bytes
SHA-256: 1493602016ea11ad93b4c564f0329787e4092221e8007c6856f1fac449420cff