Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af71bac39432f57…

MALICIOUS

PDF

67.2 KB Created: 2021-02-22 20:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 26060d7a771202d6659881032fa438e9 SHA-1: 1f906e776cb835125bfec0680f02dfb9f341e9a1 SHA-256: 4af71bac39432f5727f5c68ad3d0462cf5105da1296c1d7ccb899f8e3f50bfd1
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=sony+gold+wireless+headset+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4426823/normal_5ff26aeda06ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402737/normal_60007f0c85766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370778/normal_5ff95dd0edb3d.pdfIn PDF document text
    • http://kurs1.xyz/mixojarajagulobaluwac9lax.pdfIn PDF document text
    • https://cdn.sqhk.co/lonuxonemor/fQ631gi/26124346014.pdfIn PDF document text
    • http://trells.space/jspdf_in_angularjsc2hxy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420586/normal_5fdbbaf865e30.pdfIn PDF document text
    • https://bebabigi.weebly.com/uploads/1/3/5/9/135977904/tilix.pdfIn PDF document text
    • https://xevefoworux.weebly.com/uploads/1/3/1/3/131380592/lorewekeruta_napolebivedepok_xarovujituxelex.pdfIn PDF document text
    • https://wadoruzog.weebly.com/uploads/1/3/1/3/131379034/zujijuweki_mitofed.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/zujujazabikagex.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jNiakeJ/planetary_annihilation_legion_units.pdfIn PDF document text
    • http://flash-sar.online/how_to_log_into_my_arris_surfboardyndyu.pdfIn PDF document text
    • https://boziwukajolefix.weebly.com/uploads/1/3/2/7/132711983/zamekoxab_figutefige_sinepagikotezo.pdfIn PDF document text
    • https://cdn.sqhk.co/kolokejo/ggicGjg/31479853331.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/xejevaran-wofutukikodeme-rikiro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492918/normal_6002faaaa3368.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/8777713.pdfIn PDF document text
    • https://cdn.sqhk.co/saligoliti/axjdieC/54509722549.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000caa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA8 5536 bytes
SHA-256: 4687bd4c3328627fa876139c0a6db12e6e37f7f067da56d64e1bf1d57af5161e
font_01_sfnt_off0000dd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD66 10084 bytes
SHA-256: a0bddabfcbc2a933c35968f7b27b51dbf94789607bc78d1d7ac9b2d58c085b89