Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af62faa57344948…

MALICIOUS

PDF

86.2 KB Created: 2021-07-20 04:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 337d7f0d269d810f77db120cdf49f5f0 SHA-1: 810dbd44bd636e87fc111bf7ccfc8a1e7132c8ea SHA-256: 6af62faa5734494861edc5e61ad9652f7e8aa74317a8236e91b47c44bdc5cfbe
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://hanasushimenifee.com/uploads/files/44432593694.pdf
    • http://toanlinh.vn/upload/files/10477275860.pdf
    • http://staresecurity.com/userfiles/file/77634431812.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/ebcb9a135de42b92a3a5ca3ef5d9a152/54882140809.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823b83e8351---maxasajuverobor.pdf
    • http://driver-jazda.pl/upload/file/84628959980.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c201c3824---79978483200.pdf
    • http://lesen-und-schenken.de/userfiles/files/mitogeviwazosafuguze.pdf
    • http://muzeumostrowiec.pl/obrazy/file/87769371421.pdf
    • http://banghetretunhien.com/media/ftp/file/30258280510.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc22d0e421---puruxotimumativukonanur.pdf
    • https://astdubai.co/userfiles/files/16576973438.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a67e02b2169---19785159688.pdf
    • http://www.firengo.com/userfiles/files/didasunojomaxutikaduwifi.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20cc7bfd10---89891418194.pdf
    • http://debden.org/userfiles/file/67465582594.pdf
    • http://kppzp.pl/userfiles/file/79263447464.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b453133f57---92924065563.pdf
    • http://bulk-supplies.com/userfiles/file/34597087262.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ad12bad28c1e90b3e87959b04cb84721/zudenogubezakipuve.pdf
    • https://kabelkyaobuv.sk/editor_uploads/files/34705680472.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50658bd823---49173128272.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/1be739e3d046749b4a6a9e3a835239e5/77836761413.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0c1ac6236---77706722819.pdf
    • http://marcobernini.it/userfiles/files/27038788433.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=emancipation+by+state
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efdb.bin
fe6330a93467b6b4a4fd74405e17340f41db5ab915046afbaec2f9cf89f8d54b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 10624 bytes
font_01_sfnt_off000107f8.bin
d07456aa7ac0bd2ed98603e45d25596b6aeb5b90263e2def6bbb1b0e77660e41
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 16896 bytes
font_02_sfnt_off000133c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133C7 16792 bytes