Malicious PDF — malware analysis report

Static analysis result for SHA-256 4659aee201cc4d46…

MALICIOUS

PDF

82.5 KB Created: 2021-09-13 14:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 32ee6c9a4768e1fc535b8de92d003503 SHA-1: 29a308a649c34349abfa67f7b9bc58e0712dfa2f SHA-256: 4659aee201cc4d46ef5112cfcad7ba04b36bf00cf165bcdb016e6e950f8ab077
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are consistent with attempts to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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=how+to+move+things+to+memory+card PDF link annotation
    • http://fred-robin.com/ckfinder/userfiles/files/nonabosibarorefajuxabu.pdfIn PDF document text
    • http://araulmor.tel-cor.com/images/library/file/87265695684.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/xarewuzovevatalufididoter.pdfIn PDF document text
    • http://kemnhapkhau.com/upload/files/45678702572.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/damikovozojebugexukawi.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///jinodarug.pdfIn PDF document text
    • https://wsbtitan.com/images/file/1118108251.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/149245104.pdfIn PDF document text
    • http://ficfart.org/userfiles/file/61829729374.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/40de7cec8f8fe45e1694c32b7b0a2347/2505819477.pdfIn PDF document text
    • https://deltarealestate-eg.com/userfiles/file/56696068374.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/kikedafa.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/najotojefigipizuxuxixosa.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/sisalexoxogafopuve.pdfIn PDF document text
    • http://bjjiffy.com/upload/zewukem.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/ae4d6a9cee32ec0226a8641cfa2bd5bc/dekukovowexujawefosiketas.pdfIn PDF document text
    • http://xsteelstock.com/d/files/sajakegizelisoxijipi.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/wopobarowesejun.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/sekibiwev.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/59518253902.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/xegivajitapadaguwej.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/78760616829.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 17092 bytes
SHA-256: 640c1373b094e78b3e6a92354fe372b2d574ed56191c344836a2b2333a9e61ed
font_01_sfnt_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 11028 bytes
SHA-256: 6fac95177086f2500a7e1ac218c653b229c35c2f3738287ce2b9ae875a9e07f4
font_02_sfnt_off00012448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12448 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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