Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7ddc2e8558163a…

MALICIOUS

PDF

66.7 KB Created: 2021-02-27 09:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a8bd14f2ddabb83f44b0527489499f1e SHA-1: 21328b40691219522fdc1ba94d45095b3b3d346f SHA-256: 1a7ddc2e8558163a35e5089514333a27923487de7ede69776a39ba9230ab29be
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://resalured.ru/wix?keyword=npenn+home+access+center+login PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483610/normal_5ff66af1deb5b.pdfIn PDF document text
    • https://cdn.sqhk.co/bomemenun/SKiiThc/91181704432.pdfIn PDF document text
    • https://cdn.sqhk.co/pegipoveridi/hekn6R6/megodi.pdfIn PDF document text
    • https://cdn.sqhk.co/rodesedaded/VZcBHSo/starcraft_hd_vinyl_color_chart.pdfIn PDF document text
    • https://betetaguzom.weebly.com/uploads/1/3/2/3/132303315/1703905.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/ENjhjjX/66136497084.pdfIn PDF document text
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/f064a70c8d59d2a.pdfIn PDF document text
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/woxomeduwuzijibof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_60378002b6986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493541/normal_5fcc99cb137c0.pdfIn PDF document text
    • https://sifobidegi.weebly.com/uploads/1/3/0/8/130874382/fudebiru.pdfIn PDF document text
    • https://vitafidazi.weebly.com/uploads/1/3/4/7/134728623/madakixuxoxovazim.pdfIn PDF document text
    • https://gegaminowudajun.weebly.com/uploads/1/3/4/0/134041134/bd302.pdfIn PDF document text
    • http://damikozukigalow.22web.org/48164310304.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/towakog/32670426167.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/zazigigulinozozusa.pdfIn PDF document text
    • http://fibotujipisozu.rf.gd/angularjs_tutorial_for_beginners_step_by_step_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/wovidumeriruloror.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/55888665880.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/ultima_online_imbuing_training_guide.pdfIn PDF document text
    • http://lafeseg.rf.gd/77266502787.pdfIn PDF document text
    • http://kunasajijujaf.rf.gd/xuwek.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_off0000c876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC876 5316 bytes
SHA-256: c552b2fbb4731d9e5c30d044bdc23247b3e96ec6ec189d2b2d99de80d97f219d
font_01_sfnt_off0000da63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 10356 bytes
SHA-256: 92b4a8f9bc07294bc50f0cea96a902a176cbaabf326b1c487b25b4aae09ea2cf

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