Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6a2879236c9353…

MALICIOUS

PDF

82.8 KB Created: 2021-10-06 06:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 299a5bfe75983ec78d021856436c8669 SHA-1: acc8a523c55878b410172a337f23fcdeeb98f54d SHA-256: 0a6a2879236c93532dca7bfaa5abea2139f6a50ad54b2a8f341e09bfa610877a
146 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, with several heuristics flagging it as a link farm and one pointing to a raw IP address, indicating a phishing or redirection attempt. ClamAV detection and ML classification further support its malicious nature, likely serving as a lure to download further malware or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://hoanggiaphatland.com/uploads/image/files/99331624270.pdf In PDF document text
    • https://peintures-descours.fr/fichier/files/39745931852.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/tokiliwusowakawil.pdfPDF link annotation
    • http://muacuoi.vn/Pictures/files/75816886526.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/dixekona.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/gofeker.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/19558843628.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/gotomaxawuvamodix.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/37848167730.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/kanurozifubuwesepesejotov.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210928_DDBED004D25B3175.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/udcos8ckjdgpj90p4ouhotmvoc/safunotagosenejodalaret.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/26494723937.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/27355089270.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210912175833.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/zepuzuxofenokelajabe.pdfIn PDF document text
    • http://lesrimaudieres.com/images/uploads/file/vatiparigiwovonovipen.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/nafopazelirapotat.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/47872586206.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/getojujogizer.pdfIn PDF document text
    • https://alemarferries.alemarsnp.gr/ckfinder/userfiles/files/10967734625.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/lamupilevopaxabemeb.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/4948327278.pdfIn PDF document text
    • http://keyday.ru/files/files/42254716305.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/14427254655.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/82368569926.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/vufuxafuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=permission+letter+for+internship+from+college+pdfPDF 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_off0000dd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 18024 bytes
SHA-256: d40d52b9e1abcdb7bc6243ad021f9f7de9f110604fbf61443a024635796f974a
font_01_sfnt_off00010bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12415 10908 bytes
SHA-256: a6711b6ba45d0fff6669e2dfff593c93c6b61bc1140439b5e3a38f9904647893