Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5c722416bd1215c…

MALICIOUS

PDF

82.1 KB Created: 2021-07-03 20:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf2dd0aa815bef4a0293dc7370485605 SHA-1: fd283f78f89afeec983764a1031b484d7d924f12 SHA-256: e5c722416bd1215c6ecb2df2a00fe6f81c5b71185597b1b3d3f7912f9c033905
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a PDF containing an advance-fee scam lure, likely aiming to deceive the user into believing they are entitled to a prize or funds. The document body is heavily obfuscated, but heuristics indicate it functions as a link farm, pointing to numerous compromised WordPress upload storage locations. The presence of multiple unknown URLs associated with these compromised sites suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074967276d42---50843530371.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d922d9df7c---fanozizogovasobemapite.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/951b840ae3ab5b1e2e32bdfaa417eadf/31335147343.pdf
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/2bb1d49d6a57f77d6cfe4b4a334c8124/86863629470.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/6b13898a6695f0bb2e1f492eaa940547/47037434673.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/bfe1e7bda693a85f50fbdc50aa94fb05/semupoluwebeluvowirek.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b384efac4---23422328930.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef6c640355---1929411451.pdf
    • https://fruitssupplier.com/app/webroot/img/files/23636018932.pdf
    • http://aplus.to/userfiles/file/5191717747.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607831e43e8f9---ledunugizanefezebariv.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b0af889b489db941f970cf7ea30173cc/5048306029.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f9db67ec3---voguzufajafurole.pdf
    • http://dbhsreunion.com/clients/21010/File/zikosakonux.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/e3101544c2f37c407fa18b8250c08933/dogatubiloxaduxugabazaja.pdf
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210612142513.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b14c80cf---26104807930.pdf
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/53747555493.pdf
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/9693070349.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/25ca1551627ecbe3968e34d5c5f76290/7686065409.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/94672399773.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607009cdcd3b5---28459788651.pdf
    • http://aftckwt.com/uploads/file/potowivigaxi.pdf
    • http://cesishotel.lv/res/wysiwyg/file/52683324878.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=java+11+interview+questions+for+experienced+professionals
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB65 16792 bytes
font_01_sfnt_off0000f377.bin
f6b89451ee1689901c0845ca1c55596980d6302742976d7ee1317967057dcda9
pdf-font-stream PDF embedded font (sfnt) at offset 0xF377 17232 bytes
font_02_sfnt_off00012057.bin
ac4fd582bd07f6f88f04a8fd7073a0c144f01f280add3471bc936b01021b7521
pdf-font-stream PDF embedded font (sfnt) at offset 0x12057 11156 bytes