Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aaaeac3bce31cfb…

MALICIOUS

PDF

79.7 KB Created: 2021-02-24 19:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a50db746636818abd78dfa3fd21954de SHA-1: 9668a907d938b5c8754fc084b787445d4cc7db32 SHA-256: 9aaaeac3bce31cfb5a39e80c59d051216b1b93cdef15aa57abd1937befc1fcbf
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 0.9992

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=how+to+set+timex+ironman+essential+10 PDF link annotation
    • http://vipadobotisituz.mygamesonline.org/how_to_get_better_at_stock_trading.pdfIn PDF document text
    • http://leledup.mypressonline.com/debiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464080/normal_5ffcb7d02f129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370777/normal_6021ceffea566.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/what_is_the_rarest_nascar_diecast.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/tascam_dr-05_dr-07.pdfIn PDF document text
    • https://fugakesuj.weebly.com/uploads/1/3/0/7/130776648/voriwozivufonulux.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/65160822517.pdfIn PDF document text
    • http://best-ital.fun/6927925439044rcl.pdfIn PDF document text
    • http://salonvarna.com/nordictrack_exp_1000_repair3bo7i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408586/normal_5fee022ac9513.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403533/normal_5fe10de0a7425.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388274/normal_5fc5f92ca0381.pdfIn PDF document text
    • https://fopepusev.weebly.com/uploads/1/3/1/3/131383694/fabuposeve_fuzane_xigeneralukovi_fadaw.pdfIn PDF document text
    • http://shoop-fn.ru/neon_chrome_nails9cgxh.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/why_does_my_ukulele_strumming_sound_bad.pdfIn PDF document text
    • https://dowebirajosem.weebly.com/uploads/1/3/6/0/136010559/madulenafafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/who_is_the_best_portrait_painter.pdfIn PDF document text
    • http://tewaremiluzavag.rf.gd/62984874296.pdfIn PDF document text
    • http://sesukunijekoti.epizy.com/zuxakelojawapesasoxasibed.pdfIn PDF document text
    • http://puzazodigeza.epizy.com/77536031017.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/dukagozopujusezudolafud.pdfIn PDF document text
    • http://zagopemolal.rf.gd/zumokole.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_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 5144 bytes
SHA-256: 50d4e9ea093717652ae6ab367f9dde453082367cc1421caa7f0f1c0b49db2ac8
font_01_sfnt_off00010d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D82 10376 bytes
SHA-256: 22b4c2ae75b0440e80fd69ac7d25e08cd01e6a9e59c68365a334057a35d38351

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