Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cc88cf2107271c…

MALICIOUS

PDF

89.6 KB Created: 2021-07-23 23:04:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5fbeab979e9df0c11fe20b2c77c8d48 SHA-1: 684abf1977ae6d697a01b810168b2250d0d881e9 SHA-256: 97cc88cf2107271cceadf9b21b67abd43daed8a2ca98ad32bf3dab13ddc72019
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or use SEO manipulation tactics. The primary goal appears to be directing users to download potentially malicious software disguised as cracked applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://czpohledavky.cz/userfiles/files/52300816063.pdf
    • http://oishisushigd.com/uploads/files/17833064844.pdf
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/govajujarurok.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd091e5dd2---sulurafularapin.pdf
    • http://termocity.by/pics/files/kaduzinovid.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/klch79r6o59btjltpih4muo3qs/79216283977.pdf
    • http://beiwendq.com//data/attachment/file/71950804254.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/2t4gj5k3qh5ck589ql7gi09tj4/lejexinetitoxofe.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/4hlsfbng13239e32mf4o52ink4/13813157313.pdf
    • https://cometsecurity.in/admin/userfiles/file/xonasenumixapakopi.pdf
    • http://accessiblevehicleservices.com/userfiles/file/72652474019.pdf
    • http://alexhoffordphotography.com/temp/files/file/25596590917.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/ec2804ef1d07f82cdd9a436a31474886/banakuxevuza.pdf
    • http://ciarajewellery.com/editor_upload/file/xapenol.pdf
    • http://techniq.ae/admin/uploadfiles/file/wudibemutoxeg.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/a4d3a7fqf13g4sv8003h4hka86/32318577199.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c33f5d88ff4---rorijexikonizulomekapim.pdf
    • http://yulintimber.cn/d/files/megulovovenavalijuzuda.pdf
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/lekemuvabupetevitepuzopiw.pdf
    • http://steelbo.com/uploads/admins/u0/files/20210703172703.pdf
    • https://luyenthitoeic.info/userfiles/file/59626458718.pdf
    • http://architettoseneca.com/userfiles/files/divorasibasiwomasi.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/d17cc13a350e2d09b568979c85288ed5/tekut.pdf
    • http://transportdiverse.com/uploads/files/48818970717.pdf
    • http://watthaistuttgart.de/userfiles/file/tideperepajade.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=2020+design+v10+download+crack
    • 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_off0000ec6f.bin
33bf89185c4e2c36e1c75ea13caf7427b19c13a59c57177241fe8e7b16df966b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 28548 bytes
font_01_sfnt_off000126f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126F7 16792 bytes
font_02_sfnt_off00013f0e.bin
cc6db5b74626a65822b8df857f694820023e852cf9918adbd0314f3227acb652
pdf-font-stream PDF embedded font (sfnt) at offset 0x13F0E 10888 bytes