Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e7dfc993fbf619…

MALICIOUS

PDF

69.9 KB Created: 2021-02-05 19:49:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5da7c5890a380cd3da27ab22f4c5b68e SHA-1: 79cbc029ebd5597a784adbe4d4ac3cdcff0e2873 SHA-256: d8e7dfc993fbf61942c8de5017c87cbe13611d7886ca302618c4852dc3daa036
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=expanding+and+factorising+double+brackets+worksheet PDF link annotation
    • https://xasigali.weebly.com/uploads/1/3/4/3/134363336/c598ef.pdfIn PDF document text
    • http://eslivdrug.space/nexuspay_old_version_apkugvp5.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/kemokumalerawif.pdfIn PDF document text
    • https://depewezuluro.weebly.com/uploads/1/3/4/1/134108544/rimupulibetimaporir.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/78833be.pdfIn PDF document text
    • https://xupodidif.weebly.com/uploads/1/3/0/7/130739682/bufipunovusax.pdfIn PDF document text
    • http://rafale.store/muzalijufujedebofise499kq.pdfIn PDF document text
    • http://kabonuwumew.66ghz.com/jnc_8_guidelines_hypertensive_emergency.pdfIn PDF document text
    • https://mexupapomumag.weebly.com/uploads/1/3/0/7/130775103/d1281ef70a85.pdfIn PDF document text
    • http://lisolu.org/810007208373epf1.pdfIn PDF document text
    • http://help-service-support.com/50731108124ynfrn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jopimuriwunewok.epizy.com/nazafakevetejak.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/ccvis_form_16.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/segugobizijepekebi.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/yasin_dan_tahlil_lengkap.pdfIn PDF document text
    • http://titomozuluvexov.epizy.com/verbal_ability_notes.pdfIn PDF document text
    • http://kuvuzoruzanawip.epizy.com/18912347183.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxegu/wuxowuxirifilawugif.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_off0000d228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD228 5740 bytes
SHA-256: 8148f794412d26c9578c196c6f95fcba3bfd1e71ada6a319e9da42422c55b85f
font_01_sfnt_off0000e5ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CE 10720 bytes
SHA-256: d9bb122f9164d5946e86fb15dfbd5f4f323b99d4ac80fe5b21a62b6738fbcd45