Malicious PDF — malware analysis report

Static analysis result for SHA-256 795757167f817123…

MALICIOUS

PDF

88.9 KB Created: 2021-03-15 20:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 13acfaea23368ec836e9fa0185f08f78 SHA-1: b0e745aa0db9f72604820dc1e72d5e7300108beb SHA-256: 795757167f817123b7d1337e8591e34438c409df527b1563f6abfdbd1ccb1a70
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious and phishing-related. It contains an embedded URI and an image lure that redirects to a suspicious URL, likely for phishing purposes. Although no scripts were extracted, the PDF structure and embedded URLs strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=does+elimination+diet+work+breastfeeding PDF link annotation
    • http://fupodiruza.66ghz.com/idsa_guidelines_pneumonia_aspiration.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/32725507737.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5ffa9a1b99017.pdfIn PDF document text
    • http://malipawiw.22web.org/mi_planta_de_naranja_lima_descargar_libro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_6010d398dc808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427080/normal_6011052b36f03.pdfIn PDF document text
    • http://duzusedolatepe.mypressonline.com/list_of_trig_integrals.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424040/normal_5fdcfae4d1d57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384819/normal_5ff160b1dc1d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415081/normal_5fd6127c88374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444377/normal_6021a7eeafc25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365659/normal_600803e4304b2.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/76044639295.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/303a37ce-25b5-4ba8-9fd9-5c70f31553bf/what_does_college_and_career_readiness_mean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b79c8f03-0d0a-441b-92b9-1aa26ebd6742/nutritional_healing_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41972c36-6d92-4016-af52-241351f4514e/22348857059.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/74466562904.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 5520 bytes
SHA-256: 2dc965803c31b892d2b885702c43e16b28069eef3883e2cc00cc429d54b01cfb
font_01_sfnt_off00013067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 11128 bytes
SHA-256: 19239a443f25091ac0e59e566e1745a1d3124714421f5ad693f268d37f9f9c8b

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