Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b7a90a8687162b…

MALICIOUS

PDF

73.1 KB Created: 2021-09-05 13:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9beb2bfdcf317ce926f2581e4e9e8825 SHA-1: 076262bbeff0634de8b16e3d117aaf0b6f5ff4e0 SHA-256: 47b7a90a8687162b9420916825a7cc9a5a5bdaff234e1f3f52045e97e8e99a77
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, specifically phishing or trojan delivery. The presence of multiple external URIs and link farms suggests an attempt to lure users to external sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ad434797b726aed1908ad3bd87142b31/kitogepirixemefo.pdf In PDF document text
    • https://atcotourismtravel.com/userfiles/file/wijomonaz.pdfIn PDF document text
    • http://www.petercar0937494634.com/upload/img/files/momomizomiwofebu.pdfIn PDF document text
    • http://kuppersbusch-center.ru/uploads/files/28465142366.pdfIn PDF document text
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/75640480589.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611def814dc7d---raparodus.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/derinibilu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608551e82ee48---63867603048.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c66e6a3db3---gepikojinefedagexivur.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/4b32b5dc18aee87a14ece9bc4a5e4372/vemifiviban.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/64297784933.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/61414690145.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d3a44fa3---jexufeleruvopoxeriluxif.pdfIn PDF document text
    • https://brs.jo/userfiles/files/fiderirudivitujegamedogib.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/36570968570.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/xapapojarawiparatel.pdfIn PDF document text
    • http://jerilyndavisrobison.com/clients/870655/File/raxupobewabekugu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a568a5854e8---71362459539.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210826174434.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/zaruvemixajok.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084f55fdda53---medupobozejajuvebe.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/58879522019.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/18446881641.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/5q1r6hvnisrls1m7o99ikuppg4/dogivekumuxozopobe.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/rjtvuqgua2b37lp1tpbqg8vuls/98604493992.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/4be449df9fd59d79a52cfa1ea07f2b97/lenumaketepenus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=manualidades+arbol+de+oto%C3%B1oPDF 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_off0000bcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF8 15896 bytes
SHA-256: 3ce15877f737cffdd562f5c2be35a1b0bedbb5b16e610d73e47279a02669b638
font_01_sfnt_off0000e402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE402 10680 bytes
SHA-256: 767af64cbdaaaf148b27ad0ad82c0cc88cd343a009bdb7bc4020d42d51a44a72
font_02_sfnt_off0000fc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1