Malicious PDF — malware analysis report

Static analysis result for SHA-256 e624565ee34bf4f2…

MALICIOUS

PDF

75.9 KB Created: 2021-09-14 18:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c86c5d5884ebc8ee4b9c9916e3577b02 SHA-1: abbb2b653d7b6bbdde3aca9bf14074bc45c43a6f SHA-256: e624565ee34bf4f2ffd652e93f3617b034fe931a6c920520ccfe6a66a49267d4
164 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on compromised CMS uploads and potentially a fake invoice lure. The embedded URLs point to various domains, some of which are hosted on compromised WordPress sites, suggesting an attempt to distribute further malicious content or phishing pages. The primary attack pattern involves tricking users into clicking malicious links within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.phuongdonggolf.vn/app/webroot/uploads/files/betosapulobok.pdf In PDF document text
    • http://tai-group.com/upload/files/73795577086.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1d1960c35---visumido.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/28015572540.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/38247727537.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/59502168432.pdfIn PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/tufufunigoxonafozojevuv.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/41555707492.pdfIn PDF document text
    • http://vantaidongsaigon.com/uploads/files/filimolebobaxixa.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/lekotana.pdfIn PDF document text
    • http://invismortgagebroker.com/images/file/80274060712.pdfIn PDF document text
    • https://artedelvalle.cl/gal/files/file/vovajufifixujixi.pdfIn PDF document text
    • http://qzgj.cn/upload/file/65821508694.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/89283288094.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/besediwulaganoraxulesi.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/bakixeginesubudutisefir.pdfIn PDF document text
    • http://juncheng.tw/upload/files/77840888886.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/mulifinadimujemo.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/161c2f6667338e713c690bed20abe32b/jurikoda.pdfIn PDF document text
    • https://euroialinsol.ro/userfiles/file/xokebejowuvawosopajitufi.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/telomatoxetotawipixola.pdfIn PDF document text
    • https://gadesign52.com/uploads/files/202109071758449833.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-02-10-34-46-mk94fbBE.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613af24ae7853---77518697225.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/varutuwuxix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=watch+scrubs+online+freePDF 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_off0000c66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC66E 10664 bytes
SHA-256: 335afc7f3655751bc54d18b66250baa45dfcffc95bfbddcdc72c113bb764a277
font_01_sfnt_off0000ded2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E4 16768 bytes
SHA-256: 72ced6ff455ac50e9db7e4188ab3ccc20e210527f321183aff0c5d79815745f2

Open this report in the interactive analyzer, or submit your own file for analysis.