Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc600ded89d3f4a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-21 11:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b6d7e8dcc1d3ce62254ff6e7f75fccef SHA-1: c623426099f1839eb5a2bbad0e0ab410c57ab60a SHA-256: 1dc600ded89d3f4a9371666156246f3b0224363ac14801637d1e2c37efd4000c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, one of which, https://fokemale.ru/award?keyword=maiz+amilaceo+pdf, is flagged as an external URI and is likely used to redirect the user to a malicious site. The PDF also exhibits characteristics of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/award?keyword=maiz+amilaceo+pdf PDF link annotation
    • https://cdn.sqhk.co/gusiloxi/efYiaig/korovetivapog.pdfIn PDF document text
    • http://sberbank.services/933300110108js24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5fd12c5c4a9f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384459/normal_605520c157074.pdfIn PDF document text
    • http://rabizepafuxonag.mypressonline.com/sepioteuthis_lessoniana.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/fiehica/39826604297.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/Vhgieii/rum_raisin_ice_cream_recipe_cuisinart_machine.pdfIn PDF document text
    • http://lg-copyrightforms.com/92962966631fadkn.pdfIn PDF document text
    • http://rusadezebep.mygamesonline.org/18255630765.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/tipos_de_sistemas_economicos_que_existen_en_el_mundo.pdfIn PDF document text
    • http://xogunajeraxuda.mywebcommunity.org/pdf_to_word_downloader_online_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485163/normal_5fe6a0efeacbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486997/normal_603a8598e6987.pdfIn PDF document text
    • http://sis-paypal.com/786122961685s6qs.pdfIn PDF document text
    • http://swiss-family.space/63892509243yfa6s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/861a4ea5-5466-49d6-8c79-dc10c5997a2c/m-audio_keystation_pro_88_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eec668b-e538-48eb-8cf5-ed12e101d20f/70558406699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75cdd852-47e8-417a-be0d-3ad36fd9922e/94614483594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b9d138f-81d2-4bf4-8d8d-8e9e708c7043/64775952572.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 5

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_off0000df9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9A 5084 bytes
SHA-256: 1f15d3f9237a984563b594c89c562c17a0966bdf050ba2ca154fff2bd4466093
font_01_sfnt_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 11840 bytes
SHA-256: 648e5fda38020b05d1ac2fcf287deedfb109bf9478c06e2f5763cf99da1ff509

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