Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd6fa907b74956a…

MALICIOUS

PDF

79.3 KB Created: 2021-03-24 01:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cb608c686d7a7e682a3a7c404a124043 SHA-1: 50799cd2141bab13c467ab4ec2c19079289ee3ea SHA-256: cdd6fa907b74956ac471ce94061b7ef8ad70a17d54526a33fa303bb5ec2bab30
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 0.9993

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://soxebez.ru/strik?utm_term=can+you+build+muscle+doing+bodyweight PDF link annotation
    • http://cardioactiveufficiale.site/pokijakeje5m64h.pdfIn PDF document text
    • http://axecheat1.xyz/180557248336hetq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470962/normal_6040a9275ccde.pdfIn PDF document text
    • http://pepojen.iblogger.org/onkyo_tx-nr838_price_in_india.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493198/normal_5fe6a4f550252.pdfIn PDF document text
    • http://subikizivuwen.22web.org/99730947545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385417/normal_5fea1fcc5e54e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_601389956ce12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_6034d5d853adf.pdfIn PDF document text
    • http://gukovukub.22web.org/89941567238.pdfIn PDF document text
    • http://topvideo.design/bujumapakomigidudagonaje9tcch.pdfIn PDF document text
    • http://all-gopro.com/amplificateur_oprationnel_cours6ho03.pdfIn PDF document text
    • http://brosbass.com/android_10_samsung_galaxy_s10_release_datejjiyu.pdfIn PDF document text
    • http://zegoraperilesom.22web.org/de_nostradamus__alois_irlmaier.pdfIn PDF document text
    • http://refoxedij.iblogger.org/34389027097.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4a1fbaa0-0e67-401b-a466-96699e2e5642.filesusr.com/ugd/9647bf_6e7998ad70ab4317aaeff27f9b9b93be.pdf?index=trueIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_c0fe73e142704c7d9e486e1bb5485704.pdf?index=trueIn PDF document text
    • http://radujexoxetapil.epizy.com/tagalog_dubbed_anime_free.pdfIn PDF document text
    • http://nelifofufotilep.epizy.com/transformar_177_cm_a_pies.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_7695a99387804d07bbeb18f3b815d920.pdf?index=trueIn PDF document text
    • http://buvumurasamaku.rf.gd/swarm_intelligence_eric_bonabeau.pdfIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_92fb3358d7e647b18c829f803b0164ea.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_7fd9ae451e3646c6b3e13bbd7fdf6558.pdf?index=trueIn PDF document text
    • http://bulanorimene.rf.gd/duvogugif.pdfIn PDF document text
    • http://dokelasera.rf.gd/advanced_excel_training_institute_in_kolkata.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_off0000f585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 5496 bytes
SHA-256: 81acef57409faefaa0fe96e0739d60682734b4868078408d947749d2d4018416
font_01_sfnt_off00010822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10822 11392 bytes
SHA-256: d130c3f4f7d2fe19544108d5d956b36ba8559061bf1042a9391e133df69fc505

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