Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e14334bc9a1248…

MALICIOUS

PDF

69.4 KB Created: 2021-02-26 13:53:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 67e0b151ca8feed8a84c61b3e835aa2d SHA-1: c7568b7e89de19a737ebde180bbcef3e82378f8f SHA-256: 19e14334bc9a1248e9b24848b39f51352887b6f3c0e378227aabe4e9b0cac466
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to various domains, some of which are hosted on disposable infrastructure, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://fokemale.ru/award?keyword=text+png+logo+maker PDF link annotation
    • https://cdn.sqhk.co/golemejexeno/ifjjbja/euro_2016_soccer_flick.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/EJBjdhf/hoenn_pokedex_serebii.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/mcgraw_hill_connect_accounting_answers_chapter_1mfqhm.pdfIn PDF document text
    • https://cdn.sqhk.co/levowexesu/eojbbjH/real_simulation_experience.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/obBijRl/file_manager_pro_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_60187d036e14b.pdfIn PDF document text
    • http://d2-club.ru/how_to_set_alarm_on_sony_dream_machine_icf-c707zwk8y.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/3IlaGVk/toca_kitchen_2_free.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/ab5367b8bc893af.pdfIn PDF document text
    • https://tivofexogi.weebly.com/uploads/1/3/1/3/131398075/7338883.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464527/normal_5fdf6567b4321.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/NjVihx3/zawekiketerakidezubub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490132/normal_5fe52a508e266.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/coxoZuR/mufoxesabonut.pdfIn PDF document text
    • http://particulieres-societegenerale.best/wipakimeramafi8xuc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_6016361ba4993.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465147/normal_600280fa3eb65.pdfIn PDF document text
    • http://daddytestit.xyz/58450261278ve75q.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/igLYPlb/82472103936.pdfIn PDF document text
    • https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/niter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34B 5044 bytes
SHA-256: ea74588717331d2522d41f925cadb8160a01d6764fd028f6b5fadaf2c44438b2
font_01_sfnt_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 10592 bytes
SHA-256: aae36f0ac060801c561308f13e0d71f3bf393e77cdc6be30db7cc3ce09831dc1

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