Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3256ddd83e211e…

MALICIOUS

PDF

69.9 KB Created: 2021-03-30 23:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31b0ffa6db0586bf18b091ea20685b20 SHA-1: a92a629366b77092fa46548827c02e0874012ea4 SHA-256: 4d3256ddd83e211eddfde51d030985b0fcadaa0765410f8945bcdf9c506045ea
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=aagadu+telugu+songs+free PDF link annotation
    • http://zhigina.ru/45626241889909o.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/jj9jjhh/happy_chef_restaurant_lake_placid_florida.pdfIn PDF document text
    • http://femonejigajape.mywebcommunity.org/beginning_algebra_tobey_8th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/gokarunedod/a6fiahe/lokefakegugevudar.pdfIn PDF document text
    • http://knitfqph.site/brand_image_design_definition0gq77.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/monesofevesi.pdfIn PDF document text
    • http://czecheducation.space/fallout_3_guide_downloado77ne.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/piff6id/goal._com_arsenal_transfer.pdfIn PDF document text
    • https://cdn.sqhk.co/bibikodazit/QbWheNM/xibuwawenenazobibesotezi.pdfIn PDF document text
    • http://diwabivis.22web.org/fisin.pdfIn PDF document text
    • http://xekuluw.iblogger.org/mathematical_logic_a_course_with_exercises.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/c92ef0f2-6e63-4aec-b29f-bbd45ffd61e6/juggernaut_method_2.0.pdfIn PDF document text
    • http://dokovavoxibasu.rf.gd/one_fish_two_fish_red_fish_blue_fish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e49b0607-f431-45ec-8e64-0e23dae43928/wuwoxanatagifumikiv.pdfIn PDF document text
    • http://tevoxuvi.rf.gd/la_metamorfosis_de_franz_kafka_fragmento.pdfIn PDF document text
    • http://gerabar.epizy.com/cardiomyopathie_dilate_primitive.pdfIn PDF document text
    • http://romezegipoxo.epizy.com/nujilegaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83b89805-ce97-4a29-8154-4afab0611c3c/how_to_pair_bose_remote_to_sony_tv.pdfIn PDF document text
    • http://solezod.myartsonline.com/zoom_a2.1u_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09863be5-acba-4ec5-830b-cddc73d93f1f/love_story_novel_by_erich_segal_read_online_free.pdfIn PDF document text
    • http://fibejebovef.epizy.com/lokirejapuxewap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ae3181-5132-4f30-841f-56ac2a2b343b/3116945536.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/balancete_de_verificao_em_branco.pdfIn PDF document text
    • http://fosekor.epizy.com/vijorivupavejop.pdfIn PDF document text
    • http://kizifisen.rf.gd/small_scale_business_ideas_in_telugu.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_off0000d374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 5064 bytes
SHA-256: 1136a89becc4343d1f5b498282e988bb856c7f1bae0a23fe0050ee6130d6187f
font_01_sfnt_off0000e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 11332 bytes
SHA-256: 9fb80b626ed0beec106cbb892c2a83def98e7646eb4d414e02a1281e208485fb

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