Malicious PDF — malware analysis report

Static analysis result for SHA-256 247aa2bf2f1b67b6…

MALICIOUS

PDF

68.8 KB Created: 2021-02-15 20:05:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5abceb1b7c441dbbc690416e551f0c8c SHA-1: 13ccff8e2461fa9d21b6ac8149fd57c565954576 SHA-256: 247aa2bf2f1b67b63270f2c8d4eba5d7febbe747c4632cf01c6a3d5e8b9f19be
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://yafferge.ru/123?utm_term=how+much+does+a+prius+cost+per+month In PDF document text
    • https://cdn.sqhk.co/walumupo/jijdKgh/fejibune.pdfIn PDF document text
    • https://cdn.sqhk.co/gulaxemetila/jagjgcg/kavaf.pdfIn PDF document text
    • https://fizilotot.weebly.com/uploads/1/3/6/0/136050642/1128577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381541/normal_5fe724bca0cc7.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/haHgd8O/candy_christmas_match_3_puzzle_free_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487186/normal_6002be3a9b59f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417129/normal_6016e653dbce2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5ffd117107302.pdfIn PDF document text
    • https://cdn.sqhk.co/zisazege/gciejbS/steam_wallet_load_smart.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_6002c8e1374b9.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/heKbnhc/diversion_dance_roblox_id.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5fdbb8059ddb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417808/normal_5fc850c88d595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_6026c05a00fe6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://keviful.epizy.com/rugozew.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_off0000d07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07E 5332 bytes
SHA-256: ed903ebb6d02d5d9a05e5abd787fa6b1f25eb24a64369099732c02a1385f1294
font_01_sfnt_off0000e283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE283 10544 bytes
SHA-256: 648d99e12f28c99b47c14b67475bf8eaa68bfce36bf43a83102d08020ec0831d