Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b580cbb31405a1…

MALICIOUS

PDF

75.0 KB Created: 2021-09-03 08:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 527adea43e441ea98b1e59486f474f93 SHA-1: 1ee9372d0654eca463e6003e3b334764eeebf776 SHA-256: 82b580cbb31405a18dfea04ede22198bd4898b0cb6df88ede810c1fee5f33aaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. Although no scripts were directly extracted, the structure and URL patterns are indicative of a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://pivotal-technologies.com/userfiles/file/92621647997.pdf In PDF document text
    • http://tate79.com/clients/868750/File/pexulajo.pdfIn PDF document text
    • https://coatielectronica.com/files/8064394661.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160735675f26d1---71190582615.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/16975428194.pdfIn PDF document text
    • https://pindimana.in/uploads/file/67229957173.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607595d2d6c9c---63578140466.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/xuzafozinaga.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/92359263189.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/suxobabipofibukivogoma.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/wosajafesawodafizeta.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c11a57b135c---bujin.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d02b558d6---45073281759.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982172bf726---pesaxowez.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/78448e0afb2fcb026916430a7f0b03d7/tozetonegebiz.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/rusejigo.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/9058323660.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/882fe4723a4eb03c96346015272f1622/24033951745.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608688e2bc7b1---42948211038.pdfIn PDF document text
    • http://splogservice.ru/content/file/95644815685.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/pelizezavenumebe.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/15715217329.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/bufupijamepusibalirewotot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=mathe+klasse+10+aufgaben+pdfPDF 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_off0000bd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD66 18116 bytes
SHA-256: 96a82581fd6e23828a653ff88a8d66ce54dfa5f4919ef05063dc4f84a42e69c8
font_01_sfnt_off0000eb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 10964 bytes
SHA-256: d2e1b4488eefa4e78c2d8d0cde760437304cb110ae89343de5ffebed19521ac6
font_02_sfnt_off00010485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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