Malicious PDF — malware analysis report

Static analysis result for SHA-256 490ff0637e9e0f6b…

MALICIOUS

PDF

71.7 KB Created: 2021-02-13 05:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3caf05b57930357897b0de38e074a595 SHA-1: 04d90d87c1e9136f76ebb60f4993766be4d70205 SHA-256: 490ff0637e9e0f6be88c555c1fcd4e8ac06a9aa34c146711688c76a3d1c66ce1
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=csr+racing+apk+mod In PDF document text
    • https://cdn-cms.f-static.net/uploads/4487419/normal_60111b99d9773.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/5hkKQVs/janarupemedapafupoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_602129cf784a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405639/normal_600fbf2db8ef8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458615/normal_60238231426c3.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/icThiv3/67186425855.pdfIn PDF document text
    • https://nuzosobife.weebly.com/uploads/1/3/4/7/134734795/zovulasikabopugevo.pdfIn PDF document text
    • https://nojasiputijaze.weebly.com/uploads/1/3/4/8/134869787/petamum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_6009e448c9521.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/fKgjRjg/64317371634.pdfIn PDF document text
    • https://xitirume.weebly.com/uploads/1/3/4/3/134392652/lubadeg-kevafikupe-bipapipet.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/zamemigojat/zoses.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/86294768044.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/didixasapaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/puvunamozamevum.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/cho_gath_full_tank_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/21242337575.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/media_player_classic_full_codec_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/casio_baby_g_shock_5338_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/58128722662.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/63644587916.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/mekakomonu.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/chota_bheem_videos_free_mp4.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_off0000d9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AB 5332 bytes
SHA-256: a98e10b18590920617616a348c448693207bb44a9547766a7e53cefcd27332ee
font_01_sfnt_off0000ebb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB4 10804 bytes
SHA-256: feee5aa88db174dcf98c420c2c13f152efc84485c034369ea2d4410fb52de6c0