Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8e3e608310ebe2…

MALICIOUS

PDF

94.7 KB Created: 2021-07-16 15:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e3be280ad2e8108cae991384d6a84eb SHA-1: 7eeb91673b6d4bc1d61f7cb89784ebe47f332248 SHA-256: 9e8e3e608310ebe2a13cc9552653c595dd36240adcc812e16e826722468703b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting a link farm designed to lure users to malicious sites. The presence of external URIs and link farms indicates an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://philabc.ru/uplcv?utm_term=meaning+of+scienter PDF link annotation
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/gofibufoxiposabi.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/jasajanop.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/e2ce69c2a1360688dca5bc5b598e24da/17493598801.pdfIn PDF document text
    • http://cartopack.com/Images/file/wadeduterafipapovof.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/31925942845.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa64d575c6---12153693577.pdfIn PDF document text
    • https://atamergranit.com/userfiles/file/tiwuserokajafovalarutew.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/nuwijaxudurokujuvuxo.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608788ecb470a---xegigozamikuxag.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/norumeterumomeviwefuzuku.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/jorotodolob.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/39178491993.pdfIn PDF document text
    • https://blogsma.com/files/momojalivuvuxiwen.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210613143319.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/sipunilavevibalog.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ev7o6nuidi0omp4bhn9btlgc7f/xusakitujesatad.pdfIn PDF document text
    • http://compsult.net/userfiles/file/fatadakasowalu.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c257e101a---pozux.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/47259c4972317467a79b62675c700961/17926409641.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/remaxapu.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/d03a396de15031747f7417259b9f16a2/rufofilunid.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/e0a8229f5d32848988c548c3ff0eddd6/rabasutigaxerupiwex.pdfIn PDF document text
    • https://edusfera.pl/upload/file/74100574921.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/zevid.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ba8bc6d35---xatoxasojosajevaku.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 10460 bytes
SHA-256: c0c58d62c3f376c81902d754707056de265e304aff66fee7ff765e179bb6144f
font_01_sfnt_off00011b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B77 2084 bytes
SHA-256: 361bb0831f8224c188506e0687957ab37471248bd758f2c3a40f7bb8956eb7ea
font_02_sfnt_off000124e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF4 19068 bytes
SHA-256: 7902541b0f9cea7e9f58fa594f19bd69b12b5b5f43fa174d3b77a4151b9b75d5

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