Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b34ac6496c863e…

MALICIOUS

PDF

87.3 KB Created: 2021-07-18 06:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9793e560034e32ad9dbd701731b86db7 SHA-1: 342a74c6d85ee08300ebd93717d1bd74987e5e0c SHA-256: e4b34ac6496c863ef56c9f9a3432dfe877b1486cbf7f0f89605064e65ef3cf68
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of links, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript, though not fully analyzed here, further supports the possibility of malicious activity such as phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • 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.
  • 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://uniquestatues.com/clients/9/91/91c6e204ee4529d3b478b0717040545d/File/23631859790.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/xofixesudixabajawawam.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7b2428e32---pazeviseri.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bfe6462fe797e6a49608db14932e133a/pagune.pdf
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/jekatewotiguvemikoxopi.pdf
    • http://hifitness.hu/userfiles/file/2564299800.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160768c623d95d---83746896136.pdf
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/hi4lik5itnmvcdbe575045i68j/53463754215.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d06bba8040c---36201466203.pdf
    • http://brickchamber.com/ckfinder/userfiles/files/wozatagevesurixifijol.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac745cf12ee---luwomabideniwejose.pdf
    • http://www.deco-interieure.com/userfiles/file/lizaxifijaka.pdf
    • http://cokhibaosang.com/media/ftp/file/sodakobewuwenowigas.pdf
    • http://soflocops.net/clients/81266/File/8544123709.pdf
    • http://magogaralbamoble.com/galeria/files/15534636641.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/dc58923116624add8ab8a26e4f6dfb2b/5527841469.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/54d5220a5de72c828b4a96c32f8f5dcf/3453343418.pdf
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/84241515337.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea11ed6d4f---51081429191.pdf
    • http://vodnik48.ru/content/file/96220004589.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=makes+difficult+synonym
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f7d0cf9fed9721974fdb964b554f0fbd/37919133548.pdf
    • 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_off0000eec3.bin
db05cbceba40319d97cc83f60886f501d3aeb7213ae199f5bcd485485436246e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC3 10836 bytes
font_01_sfnt_off000107cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107CF 16792 bytes
font_02_sfnt_off00011fe1.bin
844bbdc7eccbd991d7ab2ac95b339aded629e956f32495f675d7e3196e19b227
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE1 17764 bytes