Malicious PDF — malware analysis report

Static analysis result for SHA-256 000b4dc9cf3e774e…

MALICIOUS

PDF

97.6 KB Created: 2021-07-31 10:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8532c14d695999c4306500cdd0211ff0 SHA-1: 8f395ba00ace9dc8ec35de502912ee941550d69d SHA-256: 000b4dc9cf3e774ef93ff7a6c44f408524558c87ae55c0417730ce58ad49eee0
156 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.lebedosapartotel.com/data/yukle/files/96659366546.pdf In PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/9jfl6m0q0sim1itgt8f61228v0/tagunifozapojitovefom.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/64843159067.pdfIn PDF document text
    • http://packturf.fr/files/81922966016.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/60768562685.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077509b87342---bijizikiwuduvarotufameb.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/43663788195.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9b9be9538d---jawerakezemagunu.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/m48nj1sbqufv2lns9l3eekbhr9/ketipabukidiwipituzelezo.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/82904930024.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/28789084157.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-7-3/20210703072836670953.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/muaen99neru5rom8uk5h88nac7/13516246868.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/32922315998.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607087d471b6e---tinobibepoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=gmd+immersive+pro+apk+2019PDF 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
stream_003_off0000dd7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDD7B 26436 bytes
SHA-256: 166591c055a8684e6e2497d3ce6fb1cfd4147734de5f445d4c6489c7f8033bde
font_01_sfnt_off00010bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC9 10964 bytes
SHA-256: 066f5bd119443e2557ecb56fce6fe92e6829828b3409b077a0c828291053076f
font_02_sfnt_off00012551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12551 23956 bytes
SHA-256: c6f6cd14bd026cace1943aacdb9239b7ab89f51888283237f68d1ce959238619
font_03_sfnt_off00015eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1