Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b4c18cc306e819…

MALICIOUS

PDF

79.5 KB Created: 2021-03-27 19:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ff84924333547605940471a3df9ea0c0 SHA-1: 28b3dcbdd69215f2d7ee41aad3c1a9c3c7929895 SHA-256: 89b4c18cc306e81986e064914b34353c4df1ba0150242ef57c9cb2efc4d9e272
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristic firings indicating it is a malicious redirector, specifically designed to lure users with a fake offer for an 'xbox one elite controller charging stand'. The primary IOC is the redirector URL, which is known to lead to malicious infrastructure. While no scripts were explicitly extracted, the nature of the redirector and the ML classification suggest it's part of a phishing or malware delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://yafferge.ru/strik?utm_term=xbox+one+elite+controller+charging+stand In PDF document text
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5ff01b0427997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_602fb8d8158f5.pdfIn PDF document text
    • https://cdn.sqhk.co/difigobon/iahiQhj/wixopuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482625/normal_602a1b151da8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420589/normal_60008c8a0e287.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/iiXgghh/gidofudiwuzizedo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415065/normal_5fd66780e06db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_600deb13e6566.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/cPjgrZd/89497011658.pdfIn PDF document text
    • http://mesimewipotaz.22web.org/dimensional_analysis_problems_chemistry_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410730/normal_60370269860c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448551/normal_6055f0760aaa1.pdfIn PDF document text
    • http://midorezif.iblogger.org/twitch_guide_bitrate.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/NYkhhSv/bumaxiwemodikelif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_60207a6604be1.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/pChjhay/kokev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481676/normal_5fe14758b4731.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/aj6ZgfG/black_survival_similar_games.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/gdqidcw/53020969263.pdfIn PDF document text
    • https://cdn.sqhk.co/sexipemajim/hjihhs2/baby_panda_first_word_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444358/normal_5fd93c985046d.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/aIVSzSD/27176358155.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fidazel.epizy.com/when_to_use_von_mises_vs_max_principal.pdfIn PDF document text
    • http://jomabav.epizy.com/41912551802.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5A 5176 bytes
SHA-256: 5de9d18c9b89bea68355e8ece9bc301529601a0197a7cf087a6ca58b3daef326
font_01_sfnt_off0000fbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD6 10580 bytes
SHA-256: 293dcfc46e3284ceb41fe2d4737288d11298a99b4f891ebe09f667b08a37c17f
font_02_sfnt_off00011fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176