Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abb127f766b7bc1…

MALICIOUS

PDF

83.9 KB Created: 2021-09-01 09:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fb0f842e7c359bb58f89bafd56068cf2 SHA-1: f0300875f1492098bf92c58aa2fa74c2e19cec6e SHA-256: 6abb127f766b7bc1a2108d9681cee3a3c0268ba061c138a89d7267dce9937964
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or serves as a phishing lure. The document contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted, but the structure and URL targets strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://fishtech.org/uploads/userfiles/file/file/17787570047.pdf In PDF document text
    • http://wisdomtours.net/upload/file/tidivalulivonuselivesuziw.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e39a19167a7---lomurofusubuvojatewo.pdfIn PDF document text
    • http://arlingtonhigh1960.com/clients/881088/File/36389784346.pdfIn PDF document text
    • http://padgettlawreunion.com/clients/79772/File/gidegex.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/37774234991.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f52d6d831---39450249642.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/33497287854.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/3051c30190f53ad991249990c09d4247/43915298801.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcf60e9549---bigubobifiboxaninodof.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/dexovaba.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/7476770400.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/juzifife.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/88452247314.pdfIn PDF document text
    • http://synowka.pl/galeria/file/kewerazabamuwerakipoxogat.pdfIn PDF document text
    • http://climtech.com/files/files/bidoruxege.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/24686342266.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba015cb6f23---nozomewawojepejexe.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/nusedaxonibununapejewogel.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a307a6a888e---52628958794.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/ba1e7151ea72294c67368a6fdfced16a/vemipam.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c72afe6ef241d6cc0090f928009ecdc1/63256983729.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/nivibirufazes.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/87368748716.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe14977e09f---ropipebepawivus.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076abccd62a8---durob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dogmatism+in+a+sentencePDF 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_off0000e57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57B 17484 bytes
SHA-256: dd5b071a6d6da819bcb8c54fa5ae9e824be67805179b07f0ce2a248a308b0299
font_01_sfnt_off00011254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11254 10428 bytes
SHA-256: fcc86e0068a598162ef13879e6e37414d54c9d115106c2274882c77236f52671
font_02_sfnt_off00012a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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