Malicious PDF — malware analysis report

Static analysis result for SHA-256 314d27bd948376a1…

MALICIOUS

PDF

60.2 KB Created: 2021-02-19 03:37:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 31f007e1daa307429a7ddca3edbca9c3 SHA-1: b806b36781c39843db1924164f3796a64cc3f936 SHA-256: 314d27bd948376a1f1d661fb0f140df8c5e52cc0133ea8faf337a4f6adab149d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://baarspo.ru/wix?keyword=petrucci+solutions+manual+pdf PDF link annotation
    • https://jorevubo.weebly.com/uploads/1/3/4/8/134869484/d95364.pdfIn PDF document text
    • http://profapp.pro/cobra_19_ultra_iii_service_manualhox9i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457843/normal_5fe19bc3cd4bc.pdfIn PDF document text
    • https://kapovisawok.weebly.com/uploads/1/3/4/6/134652754/7661873.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464527/normal_602eea4e3014b.pdfIn PDF document text
    • http://venira.su/teeth_occlusal_caries_tonsils_gums_report17789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_5fc7ae45201fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370762/normal_6001d469061a7.pdfIn PDF document text
    • http://alteramaks.world/infusion_pump_marketk98tt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375700/normal_5ff9d22a213ba.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/lujomevokodezufezamu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392877/normal_5fee9e339c1ad.pdfIn PDF document text
    • http://matroskin.space/daily_weekly_monthly_cleaning_schedule_template76pl6.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/wetevali/33260758533.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/jquery_ajax_post_data_from_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/15680490093.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_off0000b145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB145 5300 bytes
SHA-256: 95d2b14971b3eeb33f7f1cd72212e2fe9617e5355a477591c988eeecaf8c668a
font_01_sfnt_off0000c334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC334 9624 bytes
SHA-256: 428ba3ca027a31e8e8aa4fbd54b682896988711bc596ee7775619085782e807f