Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe5ccce550e8ff2…

MALICIOUS

PDF

72.2 KB Created: 2021-09-25 00:12:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0afca464a09114919bfedb6003ddc7ba SHA-1: e21a6572fff046c134d76d0556da58fc08c33e4e SHA-256: 5fe5ccce550e8ff28cb043c4878e20b1fdb3404f3ecbc0a7d063a12aa0522396
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. Although no executable scripts were extracted, the presence of many external URLs points towards an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://hamayeshniroo.com/shop/file/52005952657.pdf In PDF document text
    • https://angem.fr/userfiles/file/51357287405.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e654fcb9606c0b73de022293976a926a/23274800341.pdfIn PDF document text
    • http://rund-sro.cz/UserFiles/File/buzovex.pdfIn PDF document text
    • http://polkovnik.su/upload/file/gopeburewesitibumix.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/30662985628.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/9995407663.pdfIn PDF document text
    • https://eghamatkade.com/basefile/eghamatkadecom/files/rasomigonubeg.pdfIn PDF document text
    • https://la-klamm.org/Files/files/87976378233.pdfIn PDF document text
    • http://pi-consulting.ch/download/tewixurulugifamojar.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/70398321988.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/pawuropakudotupavemobexod.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/fogeruxesatefamipegawa.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161343a30e830f---fawutuxumizexifalale.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/59404219051.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/legelejawom.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/9341389772.pdfIn PDF document text
    • http://gaongonmaiphuong.vn/webroot/img/files/25254849889.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/momew.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210921154538.pdfIn PDF document text
    • http://czyxchem.com/upload/files/45476488144.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/78661315526.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/wodiparixaririnosom.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vudurowezatedefon.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/tefukebisowuwinudeku.pdfIn PDF document text
    • http://www.dean-cpa.com/files/adminpic/file/31510228666.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=asphalt+8+airborne+offlinePDF 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_off0000b853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06A 10784 bytes
SHA-256: 7da9d4705228fd402c53f7f587e8447fd5839eb072925d7ba92ff6116c004056
font_02_sfnt_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 16744 bytes
SHA-256: a7f4325fe5ead44885dd36ae08fc764a817d6a990b3c7bd99dbcf3f1db78538f