Malicious PDF — malware analysis report

Static analysis result for SHA-256 d583a40077371597…

MALICIOUS

PDF

68.4 KB Created: 2021-03-15 13:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca58829a7553f2953e4448029da29573 SHA-1: 53fa2b94c92afe6f7f2846bf2498ffcbdde9b1e0 SHA-256: d583a400773715974eb03fd1512a7801545589d3abab1c7f7c0b15a7821026e9
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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=past+simple+regular+verbs+text+pdf PDF link annotation
    • http://sesobejajanasak.iblogger.org/piano_sight_reading_exercises_for_beginners.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5ff92abcc4534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_603947ffa54e4.pdfIn PDF document text
    • https://cdn.sqhk.co/kavonalitego/YVgf8hi/vefododoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501775/normal_6041b699b4015.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/dZSaKic/40545615904.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/XIggho0/42729841901.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagisejokunego.rf.gd/b_arch_question_paper.pdfIn PDF document text
    • http://pavasokunise.epizy.com/admission_form_aiou_continue_students.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/america_s_best_dance_crew_season_1.pdfIn PDF document text
    • http://bavixefavidevok.epizy.com/fifonirekubodegab.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/27094871733.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/96926608377.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_9987eba4592c46b695f5e53a20b8896f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/exercise_guidelines_after_open_heart_surgery.pdfIn PDF document text
    • https://af30af13-e0b7-4de0-aca7-7783c01eade2.filesusr.com/ugd/9757e7_a816e7f8aa6144cd812ae879a8e17872.pdf?index=trueIn PDF document text
    • http://tiriburud.rf.gd/neripakudalomufemadeta.pdfIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_11909bb22ae64b3b8b491d3d077edc64.pdf?index=trueIn PDF document text
    • http://dadojusox.epizy.com/godepejofuja.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/new_moon_book_vs_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/dulidalakafuwojo.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_off0000cbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE7 5632 bytes
SHA-256: 849785f0002ffff706cfa22f6b1f46585e2fa333ec9b2068ab6addf88f75a62a
font_01_sfnt_off0000defc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFC 10800 bytes
SHA-256: 11bbc78e86c1f2a03a5bbaf5c88ff8b5e9c0d92d660075808376845227cb8739

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