Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3dcc55b754a8ed…

MALICIOUS

PDF

83.2 KB Created: 2021-09-16 01:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1a066ef4a9ac2ed11f209f9ba17b6a00 SHA-1: c3b2ba8299af451fab9fad7e3fd56a9f683d55ab SHA-256: cd3dcc55b754a8edef5712a98745a4d1de78ac60f8f0a80ce42f461f26d4c71c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs point towards an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://partroyfuneralhome.com/partroy/assets/file/lexab.pdf In PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/27713342421.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/lifolafopobaburelol.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141197e3d1b4---poman.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/6838976077.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/gewavolodiko.pdfIn PDF document text
    • http://finchamauto.com/pics/88106612762.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/poginifamuxijela.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/21505665608.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/83vk7separi5u95qbip7cs6c61/ferelafukiroj.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/73625439833.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/56951964171.pdfIn PDF document text
    • http://ain.proximeo.com/ckfinder/userfiles/files/vekaxozusemodiromopadapak.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/toxudizipapabigunora.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/31642217965.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/wuzug.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/fopuzajax.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/dugemuduzare.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/88023830113.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/5509854001.pdfIn PDF document text
    • http://babamoleskine.com/files/file/pasedekajeninepelewede.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/gumanozibitan.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/73697642838.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/diriwavaker.pdfIn PDF document text
    • http://phutungototuanphat.com/img-tvdl/files/valuz.pdfIn PDF document text
    • https://trieurodata.ro/images/file/66521395339.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=fifa+14+playstorePDF 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_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 19224 bytes
SHA-256: 8e4ce1e5de2542bd5f953f77f23a83dbcdc6bcd901e1318532d744e52b2a0130
font_01_sfnt_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12735 10468 bytes
SHA-256: 6fd13f6fed20fe64b3587290d0a7d42b0015468490ad4f228aeecc80fb43dbc1