Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e9a345be330358…

MALICIOUS

PDF

72.6 KB Created: 2021-02-18 15:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1f1480f43ad736165fece2c283511e5b SHA-1: 12931d2c840ce6b7e48577b828e830298be83cf0 SHA-256: 25e9a345be330358d1d53c60ad7c9f415486d5e1e5ec9474564756e9f607aa9d
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=planner+5d+apk+full+version+free+download In PDF document text
    • https://duxujofibedusor.weebly.com/uploads/1/3/4/5/134577283/wewirog.pdfIn PDF document text
    • http://kostlike.site/the_walking_dead_quest_quizzesc9rso.pdfIn PDF document text
    • http://eyebrowthreadingdallastx.com/92428813309n3flj.pdfIn PDF document text
    • http://mysteps.online/safevulakonesavjel51.pdfIn PDF document text
    • http://devgm.design/fernando_sor_studies_taboyw3q.pdfIn PDF document text
    • http://shoppermarket.online/mackie_1604_vlz3_price_in_indiazox35.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/mDRohfK/gavew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_600a109e6886e.pdfIn PDF document text
    • http://arevakar-travel.com/tome_3_50_nuances_de_greyrz5v3.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/ejfhbc0/brand_management_certificate_programs.pdfIn PDF document text
    • https://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/radojedizi_wijagosiwinin_lumijoku_nafirige.pdfIn PDF document text
    • https://naroxelilokatud.weebly.com/uploads/1/3/1/3/131384214/5836204.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/ggXjiJx/immortal_rogue_apkpure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471109/normal_5ff3838f95e74.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/kodipopujufipig/avalanche_kerrigan_lowdermilk_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/84198199987.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/65922976195.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/kusovir.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/wokarijaxodezerigedux.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_off0000deae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAE 5376 bytes
SHA-256: 25aceee6aaee445b305b51d4344a2ca88d36abee4244744a1088a098ea5389f2
font_01_sfnt_off0000f126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF126 10524 bytes
SHA-256: 25aabcfc2d956b94a3fe5e3a6809d35328f0b104e9e0a461645a7259b64238fd