Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb140a10b090eec…

MALICIOUS

PDF

80.4 KB Created: 2021-08-16 20:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 80055153110d1f25e0b958a09a24dfee SHA-1: c376937dc2873250460592090403ddace0b0bfc3 SHA-256: adb140a10b090eec72fa9b6c5bd056155c5543f8197f69479461b3ee5e0d588a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host malicious content and redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics point towards a spearphishing attachment used to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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 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 http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59d0ad07da---mowaki.pdf In PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/28592b30ca193a7a616acb87d6f0c196/23541385729.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf7bdd55b9---zudefaduvozogezapuxa.pdfIn PDF document text
    • https://peterdegendt.be/file/nisikuzonenaxunosanuke.pdfIn PDF document text
    • http://fairytaleweddingsandeventsbymary.com/clients/f/f2/f272f95a0afb65faa7304057ec0e56f6/File/panifotaxaguj.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dad7e0d24---kipefuj.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/32553144766.pdfIn PDF document text
    • https://plentis.eu/ckfinder/userfiles/files/febixigipizuvifawe.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16073cc6577520---14015456561.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/40940943165.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/8rkdb2jh3198aeth2eft1tidb2/21090523095.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/29433448947.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b9f1ba05c---motev.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/sitog.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d38b4a8fb89---rapov.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/6298a269eda2b1e7ca678e5957270a43/sisopevi.pdfIn PDF document text
    • http://dataprint.ie/uploads/file/7444518677.pdfIn PDF document text
    • http://recrute.fr/files/files/81852097389.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16074c0c81a426---55813976349.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/tusukenowifijezadizan.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b429b309660---54456220471.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/wiwexe.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608610481ca92---3114421387.pdfIn PDF document text
    • https://rowanmkt.com/Uploads/ckfinder/userfiles/files/nixasej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=outlook+web+app+forward+email+to+another+accountPDF 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_off0000d629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD629 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE40 11160 bytes
SHA-256: 57c316332bf23cca148038083c35972d8edd9ca26b110ee11a58fbd864d8e2d6
font_02_sfnt_off000107f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 16584 bytes
SHA-256: 7bc9fe1bf4ecfb46f44810caa35bbe01e999c02ef53ef670fd80b45dadf35e18

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