Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e2b69d72d47e8d…

MALICIOUS

PDF

81.3 KB Created: 2021-09-01 23:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7c2a6653013f3b8a8d394952fbaf787f SHA-1: 55aa0f5daa37568f85497d753fdbeec438b8577f SHA-256: 42e2b69d72d47e8dfd63a6e3c49aa8a0a24fb0deb76b289d19f012ba6ba40c3a
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of these links indicates an attempt to direct users to malicious destinations, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a489db57dd9---2946646043.pdf In PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160f0dad58c691---jufunikiv.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/99733340696.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/33782684629.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/35251560885.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bd4088992---37482718492.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/zijedejewuxowalupegaf.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/25549818557.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/7vq106f9kdehfiid51ec4klm54/taxapomibozatumufuzaj.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/17931020096.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/18969476031.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/somexem.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e7a6e02f0265c369c1c90c149567b078/kudutogonovax.pdfIn PDF document text
    • http://apcmagon.com/userfiles/6049467637.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/m0d6epltn2gjl7vbqipd6lrlqb/92101056060.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/56906236049.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c49e9ae7099---zokopokono.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/89664274731.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/48451733442.pdfIn PDF document text
    • http://changju-hotel.com/CKEdit/upload/files/29992974144.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/44be75ec9a88a6645c318341e9a69d43/nulinarabiw.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/fd5ecf15d666ce721d570168aaa490eb/lolava.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/ribojunujafu.pdfIn PDF document text
    • https://dpmceramiche.it/file/78654587404.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=town+hall+5+maxPDF 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_off0000d991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD991 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 10068 bytes
SHA-256: b45aa1468beb6ec95fe698758c556a37cb37074cfe48e46946cbd73749cb2908
font_02_sfnt_off000107eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EB 18024 bytes
SHA-256: 456579c78108ebf70d9ff6ebcc6381de33c20437e174865eca7bf971f1f269bb

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