Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54ff7db239a48d8…

MALICIOUS

PDF

78.6 KB Created: 2021-04-11 11:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2f29512c75becb5819da2ef20317ef2a SHA-1: 53516d1a54122b874dec954b1680c120b142bb68 SHA-256: d54ff7db239a48d82910de913afd075ad420be728009dc548143bceb3b38724b
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 0.9997

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 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://jottigo.ru/strik?utm_term=ya%25C5%259Far+nuri+%25C3%25B6zt%25C3%25BCrk+hz+ai%25C5%259Fe+ka%25C3%25A7+ya%25C5%259F%25C4%25B1nda+evlendi PDF link annotation
    • https://jevogebog.weebly.com/uploads/1/3/2/3/132303093/af79ff6a8.pdfIn PDF document text
    • http://noverst.xyz/6079985144cse9p.pdfIn PDF document text
    • http://creditscorecard.info/gejomaridomirenugamipapeb3zwcp.pdfIn PDF document text
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/b7111.pdfIn PDF document text
    • https://tenanetudoji.weebly.com/uploads/1/3/4/2/134266315/a7034625672eff.pdfIn PDF document text
    • http://weinmvc.net/adding_and_subtracting_fractions_and_mixed_numbers_worksheetaann6.pdfIn PDF document text
    • http://paxivevazuf.iblogger.org/shankara_mahadeva_song_remix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5fcf6325acf85.pdfIn PDF document text
    • https://sovuzozasofebod.weebly.com/uploads/1/3/4/3/134343281/bigonokomoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374380/normal_604aa15b966d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_5fdf63b11b712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_6018438637419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475376/normal_600db85ab6725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390069/normal_6049339969535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunuganuxik.epizy.com/calculus_early_transcendentals_2nd_edition_pearson.pdfIn PDF document text
    • http://mevedokepovi.epizy.com/delta_unisaw_start_capacitor.pdfIn PDF document text
    • http://tezonoret.epizy.com/12364011349.pdfIn PDF document text
    • http://zegifuf.epizy.com/35459861308.pdfIn PDF document text
    • http://bobupugarini.epizy.com/varesefogirop.pdfIn PDF document text
    • http://zonidagaxa.epizy.com/time_attendance_system_installation.pdfIn PDF document text
    • http://setiwol.epizy.com/legend_of_zelda_guide.pdfIn PDF document text
    • http://kitoxari.rf.gd/57899453911.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_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 5692 bytes
SHA-256: 6f09d27c44db8f90f255e7f7364c9011d5266e39ef38c9a091e4ec2b725b7ff5
font_01_sfnt_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 13556 bytes
SHA-256: 8676dd608a0a43b945660f4e96855ce7ebafc7f3879cd9f685adb752f173acde

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