Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ae2b5523d56d50…

MALICIOUS

PDF

99.1 KB Created: 2021-07-02 02:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 092fe7f04a806abeabe0f67cb74d039c SHA-1: 1ef4ff0d80c275ed8fa7cac8da91c93c53de3654 SHA-256: f2ae2b5523d56d503351255c6a2ed43d24911731767e66e0cf4825dfbfed5c1c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier strongly indicates maliciousness, and the structure suggests an attempt to direct users to potentially harmful external content. No scripts were extracted, and the document body was heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 5

  • 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 https://huntic.ru/uplcv?utm_term=wow+classic+dm+quests PDF link annotation
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9c9e2eab5---luwofalonikivajudebebigim.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/libitiz.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/fdfofbfhdussqp0prjonjpagm2/62302570213.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/lotusarifudosim.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/kexafap.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/14a4a965616dfad631900f558ded3834/3010000760.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/21838296685.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/d78b2e6e3a7c28810f3549109653c96a/mugoganuzi.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/wupezibuxud.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/60141752308.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/e6d2c16be280665cd715def02daf540c/12668031407.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c330d46ca---5397998548.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/juzumodijifolufus.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd6b28b0b2---64408946079.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/21d8a220dd32090d610699dcaf7deeac/13255995604.pdfIn PDF document text
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b61e1a397---28742153616.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/14535955853.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/furakamonumogelumuvodafu.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f67ddcbe24---gozaxewume.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/69480832397.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/gizinelib.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f14a896077---87275841426.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/jebojupofukarixij.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12076 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13888 17428 bytes
SHA-256: b43eceaa72599d6177214e15e7fccd99291ab1bf6ef4e381c45f629ac8d140eb
font_02_sfnt_off0001659e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1659E 10652 bytes
SHA-256: 295a42c456d00493a9cee5eaf8f7c97ce281bc956d5a48f6476726703f179894

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