Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa342bc06d9f75af…

MALICIOUS

PDF

102.1 KB Created: 2021-06-29 16:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: eceae0a201a056033b57762232597e69 SHA-1: 6239427016451c8b1f1f648806684343a0a78048 SHA-256: aa342bc06d9f75af48fa3e6b67e6fe354a3bca45e56809d05cf1ad879d9cd7d4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links pointing to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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://chinalanpa.com/images/upload/File/kisokabeti.pdf In PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c38ac56eb3---dawivijulovajuzedo.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/sewevofax.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/e3c0174c99f0e7d7978bf28ac0f6fdbc/lipatigebum.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/14020676059.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/69643626674.pdfIn PDF document text
    • http://dienmattroigiasi.com/uploads/files/16078652698.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6cd5e4359---dorutawa.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/12696b2c545fdb82ef873b49da2c3e98/tupifoga.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b49e2bf68---wevalabujavopekanel.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ded7f0c76---kufimuwudinikubap.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/db5070b29d2d46b7684ec85834a801a1/5159652384.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/92950441889.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cecc4ab24de---norujuro.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/pidawekuwifulemifazib.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/10011571443.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/teneju.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099c04962c8a---vukelakimafazep.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/zabipakakidavakeguri.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e485a68983---tiwimiba.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/pokahpkcj90nlq6ql76epkgpqu/9999942385.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/ef119637c15f5c526a8e3f54fc374a4f/kunirodurosi.pdfIn PDF document text
    • http://tutaylamhet.com/storage/ckfinder/files/22589291914.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/s34g35sug2h69mk7009ohe1kv2/tilegitubilefuleb.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/u1pgh4pi6acrcbchm30ju0nu3n/bifoj.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/gigawu.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/6511ef6caadcdb5459a7508a0f7863c7/98663206640.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=3+of+swords+tarot+card+meaningPDF 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_off00012b57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001436e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436E 10932 bytes
SHA-256: 89613dacdd042ca9d860bfed7b377723ef796c4fd75067904674208fd5940821
font_02_sfnt_off00015ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA0 17236 bytes
SHA-256: 9038811825077b775a5dd19a075984fafd13b776b81573bdbc4a936aa7ffd863