Malicious PDF — malware analysis report

Static analysis result for SHA-256 744d14d7b71534db…

MALICIOUS

PDF

109.1 KB Created: 2021-07-13 21:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 308d0dbd98b103c2f6b7679f2d8a1dd2 SHA-1: d45398c072a99f5f4220bc9aa6b9900ae18e185c SHA-256: 744d14d7b71534dbe11ec5788b41f4514fc3c37ad405d9f46fb56e055510b402
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, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with many URLs pointing to compromised WordPress upload directories and disposable hosting. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

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 http://elisa5888.com/shopadmin/upload/files/bijutuven.pdf In PDF document text
    • http://toptoptraining.ru/img/upload/file/5750747782.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/rezerutu.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/1f73e2c69fc0b130928f46054b87790c/noselopiz.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/zejipuxabo.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/828e42c5fc5747491d1957db2d3a57ef/88504509014.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/69847033856.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608714a42da77---nudami.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3f42b2f12---93103208556.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/xekizavire.pdfIn PDF document text
    • https://designclarf.it/file/laxuxaromilu.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/89503986198.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/bi1itjndlb0a44im97h0fic5l1/ruvigojemugejifox.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/c44u2u8ro5g1ulk5g2t300b3hv/35237001543.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/wudamutelojunewo.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/d048379569d45fe6df1fe402cb8600c2/bipogo.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/veturufe.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/17624334821.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0136560fa5343a3faf94abe5fe6c86a9/66420203517.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7a6c74c5fcaa7574964574cc469fa4ce/kagamesuxisutixer.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/xariburibimalenako.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/genotorawaw.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608e74e787c57---54710763789.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/8frlhp8k550jl8g94m50d9b8ed/duwaxotamilisemez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=plural+of+knifePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000116f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x116F9 23620 bytes
SHA-256: 0b0114012018b21f155a0fb19e3a0f242a5b7f845543b6c89965199039b85d6f
font_00_sfnt_off0000e68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9B 6976 bytes
SHA-256: 2abbf16a836a57d1b5061d49f92a76d0d7592f9eaedd27e61b852bd5be214f2e
font_03_sfnt_off000141a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141A4 32536 bytes
SHA-256: b1a22896de1a77da5f7e964ebee205744e0c9bb7b90f745c24dd6223f9cf321e
font_04_sfnt_off00018e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E5D 10132 bytes
SHA-256: 2034112ee3216f5c22aab3efed826e6cf23ee089a96ae09e243980ccefc86115

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