Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea2615ffad9bf16e…

MALICIOUS

PDF

87.5 KB Created: 2021-06-28 23:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1dbf693aaa3f6701e5dda87f255de51d SHA-1: a903fb749a3eb34c58e0fb6e5cb1316e72d4f5ba SHA-256: ea2615ffad9bf16e3fb8a7de23d52fab913ba2988b3c7007b4c3972089ec2fd4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of urgency lures further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.evisiontiendaonline.com/ckfinder/userfiles/files/xisetevetufoxawixorivijeg.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/b7100ed0b3b88394a75a1ac92da4c5fa/kowozex.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/6011e34b7cdfd56917416ddb099d42be/kuxabarewojosonapasebesex.pdf
    • https://immo-cjeanpaul.lu/userfiles/files/ruwerowutubumisusolega.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/2b537d45fad3f986dfe8ccb5669b255e/tikuxizalupopisolog.pdf
    • http://mosjob.ru/images/file/94895539827.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/io3929u8gsa4f673au5hn979rg/42521127586.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/p3guqjt9p6ph29o250nqp8irbl/80154393576.pdf
    • http://okwecare.com/usr/userfiles/files/dekamogegamaxaluroposu.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd223c07f13---46276904222.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/9fe74ec0e300699d918b791797b07242/14479979506.pdf
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/numewazedobibizomof.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/23251786b346923bb54eba5a35a690e2/mokofele.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/d5b54ri8uk5emc2ocubrfa1ko7/22514781509.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7212747080afd9dc52ea0527c4bd5c0d/womezurewodijusuvopegeso.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3376a8f920---xibexudegonekajodi.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076662beeb8d---zadelala.pdf
    • http://aven.su/userfiles/file/56419247581.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160868d2097423---xofoxomudebemaj.pdf
    • http://kath-kiga-bw.de/bilder/berichte/file/fekonavoweku.pdf
    • https://amrapalispot.com/userfiles/file/pixokudefetolufezagaxeke.pdf
    • https://tonwen.org/userfiles/file/rexidobebuko.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe91dc3485---wenaw.pdf
    • http://tfforming.ru/d/files/juruwirijagerorepukisero.pdf
    • https://cmsschoolkg.org/userfiles/file/deduvewera.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=in+the+state+of+texas+do+you+have+to+have+a+front+license+plate
    • 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_off0000f0b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 16792 bytes
font_01_sfnt_off000108cc.bin
fd322a3bc39dd17a3ce8236a5792cc5751e16b7403a287ed46ab7713f4a0217a
pdf-font-stream PDF embedded font (sfnt) at offset 0x108CC 11048 bytes
font_02_sfnt_off0001227f.bin
be873f55bcc042afc3a52946ee68c9fdf33db4228fe945dde00f0f944b9da528
pdf-font-stream PDF embedded font (sfnt) at offset 0x1227F 17344 bytes