Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0d72f2b76d6816…

MALICIOUS

PDF

95.4 KB Created: 2021-06-27 03:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f56fde385813cff28674f59e437fde5 SHA-1: 4da862ce19ed9ea150d2d28bd96147000f02c48a SHA-256: 9f0d72f2b76d681693cc12143460a2a2257e390fe258798ad5cbb2a2cd93ba55
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure points to an attempt to lure users to malicious external PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/f425aba49de0ca429f4df9e30757fd94/35315114079.pdf
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/12835069328.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f2199f13c---zekatinem.pdf
    • https://stiff.pl/ckfinder/userfiles/files/67345415237.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944580cecca---gulifuzisuzeperaf.pdf
    • http://grapevinewinerytrail.com/clients/876125/File/zokazup.pdf
    • https://daquin-ferriere.fr/userfiles/file/21653610848.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/3885c7ae243b8c341517a3f37a2396de/63295514898.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160884e3325eed---jiwaponatavadano.pdf
    • http://decom.pro/admin/ckfinder/userfiles/files/zevejuxalowovatamokutevox.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/lfhnb08bt75ffkbdci0s4g3mrb/24125034401.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7aeb9aa17---dizebalajunun.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/tamuvovivunikokudolazem.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c90d66c45c---xezitebajitafumew.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/o92fpcdv85lvdfdjc0489138j2/konivalo.pdf
    • http://creative-format.com/upload/editor/files/50417699879.pdf
    • http://aygroupmuh.com/image/files/81357790339.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/k4gjs71mbtmo53i4qug5gec983/11658264187.pdf
    • http://gyobel.itpublic/file/3650533224.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a049aa47691---meledovenewolezanofi.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f1941281d---xilovivesod.pdf
    • http://glotecgh.com/upload/editor/file/32045231778.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f831dafb57---37651612091.pdf
    • http://badaranquehablar.com/userfiles/files/11284421802.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a6756b2a9---dixazeteluvorof.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+do+you+answer+the+question+what+are+your+weaknesses+in+an+interview
    • 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_off00010fce.bin
fbb89f52d6edc2c829b8eb6c33ade0404da17b311566d31f4313a03617cfb24b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCE 17792 bytes
font_01_sfnt_off00013e7a.bin
50d4b999df28fd6e5b219466c8e63189ffec37a72c0e50ad6a4da4f62e6b364c
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7A 10892 bytes
font_02_sfnt_off0001577b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1577B 16792 bytes