Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ec805b8bc9f7da…

MALICIOUS

PDF

90.6 KB Created: 2021-06-29 04:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: adeece03ccfa6e58083e8061d3e32e63 SHA-1: 7d281f2d3a8aef2883b3a02cc14148cfd56f8360 SHA-256: 49ec805b8bc9f7da2678fbd70c8c253de8b01423a3acc7596ecf7a454cde666e
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://investmentskillsgroup.com/images/userfiles/file/zokedijudubejebes.pdf In PDF document text
    • http://bestbuyfromindia.com/userfiles/file/zupanal.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/9cad04cbb5eef21b6f957a0c4e04dae1/gigabaloduluwotetipen.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/fesed.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/31780243064.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609de2364d295---pevusipezelivono.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6d5030bc4---67227962193.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/4i23m3bmb9a1fpm1qc8bfgrom4q9j6ki/pevaxizoresusujim.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608252b772cf6---37670807370.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/170d92a1bf1a1ebca5e60f268a6d03f2/41849884655.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/mevaponabufipem.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdceeebfcde---50895078969.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/1a6c5c84b830211c108c058565222ff8/56901579094.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/mataboxiwuzatuvojoto.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/mulebekapogowogupud.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/2511319089.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/3fca21ad8f4ab8b72b33ad111a818ffc/jojajadi.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a296127caf---95532822950.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/taramisawamobizok.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/28380074221.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/0b433e3c61cb4253fc5da66cf4eed51b/lunijitirobolujodimawaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=figma+export+pdf+with+linksPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 11200 bytes
SHA-256: 3a26d5f5f579fd8b034aa6c68164ccd99f02054fd6fde528e1bc48a4ee7e868d
font_01_sfnt_off0000fe4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 16916 bytes
SHA-256: d25397019e53e6b9deb3f65fc2fca1db740ae17c39beeca3ad08885fa248a71a
font_02_sfnt_off000116ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116AB 17716 bytes
SHA-256: bbe78673319d8252a1b38873cb26d5177d38cc5dd2fff3c6f45c5b238945053b
font_03_sfnt_off00014517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14517 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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