Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10f2971858d5e35…

MALICIOUS

PDF

96.2 KB Created: 2021-08-01 22:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f53ccdec44b30e4bae9e640f6b629ed1 SHA-1: b83dcaa916c898b4497aeb11b3ef756356314c57 SHA-256: c10f2971858d5e35c49d755be155346d802bb435e1ef3b66e19461c2d38e1df5
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f23c963647---xitokiwulazivarotazu.pdf In PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c775d660375fdefaf096d206b8180470/45547695712.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/05b782fbcde3274223e515f9cc2dbe51/51725656725.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b643d1807d8---titulimewawewigodopef.pdfIn PDF document text
    • http://flgr.ru/files/files/75594263084.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/nusoxaxujukogevizadafetav.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e685cd83409---vatuvu.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/31856180.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/3439952a37d47d92f7657a7fb3bd66d2/bowepanuveraguv.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/40977386290.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c8970c0bd---didokulogoxenolowub.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/nupesomidofaf.pdfIn PDF document text
    • http://terremeraude.com/userfiles/file/nipenufagasedopefudotiged.pdfIn PDF document text
    • http://palami.by/images/file/19414016814.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075b25b5080e---fifamixemixumiku.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/a78e9ab6da9d26deee5a51042b6c4222/62718040572.pdfIn PDF document text
    • http://atomleasing.ru/media/File/15479592507.pdfIn PDF document text
    • http://plncse.hu/php_data/file/3696350281.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/4470633888.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8d67ee511---95213076913.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c777d9d40d6---64183739845.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3666d90f21c7718a0f4dd51044d7a8b5/wigadurexugizigibewox.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a689e23b21f---42179113184.pdfIn PDF document text
    • http://falerisztika.hu/tmp/jukoxapogepipepekum.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c5af8571991---82910983262.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/26563268274.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=adobe+audition+cs6+presets+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA34 18020 bytes
SHA-256: 31de73423ad8513143dd1c1e4fec5553e2cdfd8a8b8e275dd06139a8d4b746eb
font_01_sfnt_off00012a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0D 16372 bytes
SHA-256: d967ff0d244d4c4447f2ce6582f696d79354395068513e193762d8f6555fdd6d
font_02_sfnt_off0001402f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1402F 10980 bytes
SHA-256: 0e048afec41cfdaf5a5231e61a96ec93267ee84aa4167c3718ebf1c7302e3fbd
font_03_sfnt_off000159ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.