Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a179f0af2decaad…

MALICIOUS

PDF

83.9 KB Created: 2021-09-22 14:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48888ce6d900e7c5e5e6b4530e4fa2dc SHA-1: b08389c9e6c9bff57c918cec9e238d32f08c3bba SHA-256: 5a179f0af2decaad368b75599146e01dcac3ba184656f64cc1266e7546bceb63
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131c51f12a2a---rutasabamosulinukiz.pdf In PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149509b8d9f7---81180060512.pdfIn PDF document text
    • https://gppacdatabase.net/userfiles/file/73054732581.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/figijijibogo.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144bf1fc348a---91951671852.pdfIn PDF document text
    • http://maksimetall.ru/files/98100492085.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1630808184.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/sirulexexesurosuduv.pdfIn PDF document text
    • https://aspirans.com/files/file/41635853728.pdfIn PDF document text
    • http://polins.org/public/userfiles/file/kedigiwometuwibop.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/71fc9253913265972e4033d62bdf1cb8/dodexajapijuxana.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/jixorimakaganafetadukiju.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/kifivawikipufod.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16142b80401ce2---rotugezuremenokigega.pdfIn PDF document text
    • http://cke.hk/userfiles/xumulorofipub.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/muzefu.pdfIn PDF document text
    • https://istanajp.net/contents/files/93284814251.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-20/20210920104808943786.pdfIn PDF document text
    • http://poliinc.com/upload/files/38756819822.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/93340317856.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/1221912830.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/28289578612.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/45728251544.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/54974776888.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=esound+apk+downloadPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 21144 bytes
SHA-256: 35fcb4f6b82865e92b5350d751a7ba210e5e1c1dce77df9f38f89cd43c763683
font_01_sfnt_off000112bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BB 10224 bytes
SHA-256: 3f4d31e3e5e78ea6ec16b5c207f0c004722c9f602c51c25254d3075bd4ee7073
font_02_sfnt_off000129d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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