Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7782caa5b5c7048…

MALICIOUS

PDF

64.5 KB Created: 2021-02-23 12:42:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e808e418c8d6b356a7b56352a4519ccf SHA-1: 412bd51a3c8c27948cd858ae15060706cb128549 SHA-256: c7782caa5b5c70485935d2751de9a0cefd96feae4a390737e3ab1ba035fa8222
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://bologen.ru/wix?keyword=apk+editor+pro+free+download+version+1.8+28 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fd62c29da25e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6016378f40c9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_602f4a9e5f435.pdfIn PDF document text
    • http://hook-up.fun/catalogue_marjane_juin_2020em7zz.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/495734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413225/normal_5ff174a8e7555.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489595/normal_5ff22bc7419e0.pdfIn PDF document text
    • https://kizifafub.weebly.com/uploads/1/3/4/7/134714450/degizafugowez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371269/normal_5ff75a6609f91.pdfIn PDF document text
    • https://xufuluzigi.weebly.com/uploads/1/3/4/2/134266078/ditekoto-naxikegufew-xegeteletozaz.pdfIn PDF document text
    • https://vonuvevija.weebly.com/uploads/1/3/1/4/131407152/popavodokeg-newebonediwez.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/wiwamoxamo/83821892957.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/89628216177.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/google_weather_report_coimbatore.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/vofomageliwobezakirolag.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/pumaxiw.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/95123592459.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_off0000bf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF12 5652 bytes
SHA-256: 5505733fefbda9008899dce24c93aa7d9f4b087c4b18f71fe2f793c775fba4d9
font_01_sfnt_off0000d27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27D 10008 bytes
SHA-256: 30b39cce9a5689e9952e9e176f9783141971374bc536c9699e4cbf45d09d70f3

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