Malicious PDF — malware analysis report

Static analysis result for SHA-256 242e6654c54ed6f9…

MALICIOUS

PDF

76.9 KB Created: 2021-02-15 22:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6372a8fef9f102503b6f79451f6b4aaa SHA-1: 8168b35fe48bab9408cbdc3b525eeb5198ff29a7 SHA-256: 242e6654c54ed6f976ca9d771fb35df184b0e11003d3a32bb1166044676e7081
224 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector leading to a phishing lure. The heuristic 'SE_MFA_LURE' indicates the document is designed to harvest credentials or session tokens, likely by directing the user to a fake login page via the embedded links. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=curso+de+ingles+gratis+en+orlando+fl In PDF document text
    • https://cdn.sqhk.co/gizukakom/hiehcih/wasefosedun.pdfIn PDF document text
    • https://balixilime.weebly.com/uploads/1/3/1/3/131398392/rorap.pdfIn PDF document text
    • http://kijorifoweb.22web.org/angry_birds_mod_apk_star_wars.pdfIn PDF document text
    • http://radanews.site/tucson_cardboard_recycling_pickuprje2x.pdfIn PDF document text
    • http://ebay-coupon.ru/best_photo_editing_app_online_freeef75h.pdfIn PDF document text
    • http://urolog.xyz/mimujxmu6u.pdfIn PDF document text
    • http://loxigedu.iblogger.org/baby_ko_bass_pasand_hai_song.pdfIn PDF document text
    • https://gitikaru.weebly.com/uploads/1/3/4/9/134901111/sizejulekiruxafa.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/lalefokudilebezafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426810/normal_5fddbd03b7031.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/he310UM/19674887277.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupesiparu/xD2tbgd/.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/ihXbibH/xabavidofutafenapexoj.pdfIn PDF document text
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/6823092.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bovuzigaratufob.rf.gd/vijogoditavumedepiwex.pdfIn PDF document text
    • http://bisiziwaros.epizy.com/81800078958.pdfIn PDF document text
    • http://mepivew.epizy.com/lejijebemeririb.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB30 4980 bytes
SHA-256: 7afeada84d9375044756c7224629507015add1fd5269c5c2b5122947f16c386f
font_01_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 12516 bytes
SHA-256: cd1e275bea5fc965c5acf6e80158c2220fae90172a52ae5f00ada5f7d5a0b362

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