Malicious PDF — malware analysis report

Static analysis result for SHA-256 756ca149d8c912d5…

MALICIOUS

PDF

82.1 KB Created: 2021-09-09 14:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dc8b583f7f2fcc015b201f50bd59282f SHA-1: 7d1d1428050dff623c4ebd9cbd78f4e1506fe21e SHA-256: 756ca149d8c912d5c7a707995c004c2808821e5be2c3f4cf2d6eb457be993a1f
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. The embedded URLs, such as the one containing 'bein+sport+hack+apk', suggest a lure to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://catbasailing.com/upload/fck/file/68796588997.pdf In PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/cc477890461820bf4edb3277df0ebbfd/pufavubozem.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/16488416966.pdfIn PDF document text
    • http://hladonural.ru/upload_picture/19528372892.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/22127791637.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/69387202743.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/48643128874.pdfIn PDF document text
    • http://portableandcool.com/files/files/zozifidanido.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/neziwarukej.pdfIn PDF document text
    • https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/kejixikanisurolozegax.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/kuxuzigubapogewomonasak.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/76a2ecf8df8a6aec76b11298bfb095dd/kukanebofotan.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/viwamuzotumezubinokixiruj.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/xafuwevobepezodavazugo.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/zumuwolotipitesomaka.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78300330901.pdfIn PDF document text
    • http://duz-drustvo.si/uporabnik/file/rutonovejovidebemim.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/gejutonizajib.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613983587b523---62243036353.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/77463686086.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff781e7fe4.pdfIn PDF document text
    • http://xatrbio.com/userfiles/file/57775582875.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210904000104.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=bein+sport+hack+apkPDF 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_off0000d95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95F 10568 bytes
SHA-256: 17cdac9909c94257cc40d84fe3808f95b34a10b84fbf74330f66dee22711d5db
font_01_sfnt_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 18848 bytes
SHA-256: 2755dff8e3f0a444b39dbf01cb534083a8c7d1a054ec337463e457d6182a1ec4
font_02_sfnt_off000122cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1