Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e8c22b507bea96…

MALICIOUS

PDF

78.6 KB Created: 2021-03-25 00:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f19324a7a0ae44c5bee329641dbd709b SHA-1: 9e942d3b695438ad90735612a7fe35fd3eeea643 SHA-256: b9e8c22b507bea96565a65039828f190dcc7bc9ef69854a787467b8739563f9c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ponafet.ru/award?keyword=acadia+national+park+hiking+map+pdf PDF link annotation
    • http://letnesil.xyz/rca_systemlink_3_codesuqx2v.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/brief_cognitive_assessment_tool_for_schizophrenia_b_cats.pdfIn PDF document text
    • http://japancar-sib.ru/proyeksi_amerika_dan_eropa648xw.pdfIn PDF document text
    • http://hydraruzxpnew4af.exchange/fomojezabs9ava.pdfIn PDF document text
    • http://xaredazisom.mywebcommunity.org/33982357750.pdfIn PDF document text
    • http://worldthailand.fun/crackshooter_flyff_buildcvo3j.pdfIn PDF document text
    • http://liketime.online/learn_english_grammar_free_course8wlef.pdfIn PDF document text
    • http://vsspb.ru/nadaxafawufurikexutexodavao1v.pdfIn PDF document text
    • http://nitiwomifigurod.mygamesonline.org/pewujivejufavubatate.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/how_to_adopt_a_child_from_foster_care_in_florida.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/how_to_make_a_schematic_file_in_minecraft.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/xorugiwasuxepidawa.pdfIn PDF document text
    • http://conicppjry.bid/famous_quotes_from_alice_in_wonderlandinc4p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejesezape.myartsonline.com/56167017558.pdfIn PDF document text
    • http://jadivepijuga.myartsonline.com/baboning_kitab_primbon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7b37f3-2977-4d27-b170-bceccfd5e2be/are_the_lord_of_the_rings_movies_good_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f761059-c449-4a06-b21d-aa0bd2dd604e/surut.pdfIn PDF document text
    • http://bakakixutuv.myartsonline.com/61184313535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e99a806b-3a3c-4c3d-ab52-63b24fa7e027/payday_2_ps3_money_glitch.pdfIn PDF document text
    • http://xologikaju.atwebpages.com/62859365702.pdfIn PDF document text
    • http://bidajalej.onlinewebshop.net/78300456187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a2caaad-bc1e-4d0d-a7cc-93c2f81f06e2/pasipit.pdfIn PDF document text
    • http://lufiwivumijej.myartsonline.com/author_s_purpose_quiz.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_off0000f577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 5444 bytes
SHA-256: 831f507e9b88d68633057417f373b80046ee9ef9e39683dc9a50cf6ccd1a7831
font_01_sfnt_off000107d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D9 10900 bytes
SHA-256: f7d6ce302d414a373274cc0fefefb3967d4cc7ef579f284a26ab4eedf1623881

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