Malicious PDF — malware analysis report

Static analysis result for SHA-256 62235bc87e255f88…

MALICIOUS

PDF

84.4 KB Created: 2021-09-03 15:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 108850f581aa58fe668bc2edd6fdf635 SHA-1: 50e10c99a093259b6f9c02916852749cf8b42a14 SHA-256: 62235bc87e255f88da9e59aa7091718864fdddb29aead1e0ac1509fab60cfcb2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV confirming it as Pdf.Phishing.Trojan. The presence of a 'Password-protected archive handoff' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. The numerous embedded URLs, many pointing to compromised CMS uploads, suggest a link farm designed to redirect users to malicious content or download further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.hgbehringer.de/img/files/files/judalif.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/5ae3a1056c45e0d6b5a6aea7c509f8c5/latubadupape.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/omvtr6cacjndp237i9789o32mm/15345078127.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c328c20f369---jetajatizi.pdf
    • https://nedimgame.com/calisma2/files/uploads/sifetoruguxute.pdf
    • https://cv-vezouze.fr/media/file/kalinupavazivobaxuzeron.pdf
    • https://styliststudios.com/imagesTE/file/pivatib.pdf
    • http://mwflower.com/upimagesfile///vuxusekunonatekaxupo.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3941853271---87894842477.pdf
    • http://asustainable.com/global/file/fowowavovijepunudo.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be22c4af0b5---45715060485.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/7955c54e9116a9eb49ba78391510c541/95389577755.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/aa1004d260ee6abd8696e32395c2e7ee/69820572953.pdf
    • http://lifecare4all.com/upload/files/zewowejijopikifurutozul.pdf
    • https://circolodelpistone.ch/userfiles/file/57210226940.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/kmirn9jjihfpe3khkblen6gfqn/97849715707.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608061b03c07d---jumigimojisegogofu.pdf
    • http://heninrealty.com/userfiles/files/59798863736.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f967670dfd---66135909583.pdf
    • https://majubesar.org/contents//files/94113971046.pdf
    • http://ahkjt.com/upfile/file/nolekebak.pdf
    • http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66406382248.pdf
    • https://budapestpainter.hu/ckfinder/userfiles/files/83296457853.pdf
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/006f15f53229bbd1c999c9e7a92387a2/45206240842.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a9366b5a8cc---65089559793.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=teoria+de+inteligencias+multiples+pdf
    • 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_off0000e0c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 16792 bytes
font_01_sfnt_off0000f8df.bin
6ed1a4fa430b28f055ef23f73596730eb2473e4a00c03ac78d8deacc9b051f9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DF 11024 bytes
font_02_sfnt_off00011246.bin
d4d45e3e75dab7b470740d9b75c11c42fa7b2bde99b04b4e3d131fa369497256
pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 19304 bytes