Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2551df09f3bc1f…

MALICIOUS

PDF

86.1 KB Created: 2021-05-21 21:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 70ee047900a878b48929b0873b310684 SHA-1: b25d4ced561df47d182fa569c900bb7c823ee8b9 SHA-256: 2c2551df09f3bc1f0f3a0e763f745c687b4c65f073f7bb4d91278876fa25d753
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://pelibifir.ru/strik?utm_term=last+day+on+earth+survival+season+14 PDF link annotation
    • https://zunexoxefa.weebly.com/uploads/1/3/5/3/135340588/fisamavawoxugafe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5fe5b996c8e85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_6057f7ff77d4d.pdfIn PDF document text
    • https://pobipumobixox.weebly.com/uploads/1/3/1/0/131070364/8551144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_604e173004c77.pdfIn PDF document text
    • https://rixikevepu.weebly.com/uploads/1/3/1/4/131408169/2846a881537d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_604fef5a36068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409811/normal_6040d5d9e3a43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444649/normal_5fec519b197c4.pdfIn PDF document text
    • https://sopunarexij.weebly.com/uploads/1/3/1/8/131857112/2436425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449411/normal_602006e594c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_606291b01e499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464702/normal_6049c4ca69836.pdfIn PDF document text
    • https://wurudejokifar.weebly.com/uploads/1/3/0/7/130776262/9058122.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/xufoxorog/how_many_pounds_is_4_sweet_potatoes.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/29601499098.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/26431596751.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/ages_and_stages_of_development.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/canticle_of_the_turning.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/2018_best_games_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/22420080889.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/gikogofudekipunepe.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/zulobujozowugitukivudagof.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/sony_ps3_controller_for_sale_south_africa.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_off000110db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DB 5156 bytes
SHA-256: 88ab4b68a638061e4044c6710aa0e12e0e4837392ae95670ec5feec58529ad78
font_01_sfnt_off00012273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12273 12680 bytes
SHA-256: 3cfdb1ed22a7283ef9f992a60d22e3d18293fea804ad9d25309770ee64778ccd

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