Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b242f24445ae1bd…

MALICIOUS

PDF

82.8 KB Created: 2021-04-06 01:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bc3d85375ac6186d43d215fcb50444b7 SHA-1: 554e9c5e3b939e5bb0984448f5ab9102c27f2969 SHA-256: 1b242f24445ae1bdbd8443e9c002f30588945ecd52f68473e11ff916f995e078
166 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 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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://dafemum.ru/strik?utm_term=what+is+the+significance+of+federalist+78 PDF link annotation
    • https://leneguvajetuse.weebly.com/uploads/1/3/1/3/131380977/2581724.pdfIn PDF document text
    • http://onenature.space/32607501688vh5i7.pdfIn PDF document text
    • https://kajubogoxin.weebly.com/uploads/1/3/0/9/130969430/rovajifitebizav-fozixu-bijewobegu.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/ranger_boat_dealers.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/99885495485zyjc8.pdfIn PDF document text
    • http://yandex-delivery.cc/709230527463fs7q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404745/normal_5fc8fdae52a51.pdfIn PDF document text
    • http://wozovumorawoka.sportsontheweb.net/12374043691.pdfIn PDF document text
    • http://tobafiga.medianewsonline.com/lafetefijevawo.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/kojemujadejorenowivaj.pdfIn PDF document text
    • http://com-login8.xyz/bloqueo_redes_sociales_mikrotikhj3p2.pdfIn PDF document text
    • http://keto-s1.com/bible_commentary_online_strongsk3jp4.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/why_did_the_renaissance_began_in_italy_and_not_another_part_of_europex9e8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453342/normal_603be81dc320c.pdfIn PDF document text
    • http://artrosil.xyz/what_is_the_basic_definition_of_humanism2pe48.pdfIn PDF document text
    • https://sawulazu.weebly.com/uploads/1/3/4/5/134588127/d29be0ab6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_604375b986189.pdfIn PDF document text
    • http://copyrightnotice-ig.com/colon_cancer_screening_guidelines_age34ohf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/urine_culture_report_sterile_means.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/minaguzeditowozure.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/gojoweti.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/wow_legion_computer_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/what_were_the_plans_for_reconstruction.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_off0001085a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085A 5568 bytes
SHA-256: 48182161d2e31c03c2435d3244d451809eac5cab6dc611928bde20bd09bc0ae1
font_01_sfnt_off00011b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B57 10148 bytes
SHA-256: b0db94c593436a896ad514ed90d1f8687f4935cdd73b78c2b13a32bd806f98e4

Open this report in the interactive analyzer, or submit your own file for analysis.