Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cdf2db0f7f47ba…

MALICIOUS

PDF

85.9 KB Created: 2021-07-06 21:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6a0e3252e25e520462e7ced7c261508a SHA-1: b8bc76ce069471a9719eb485f24a9527b51f98d8 SHA-256: e5cdf2db0f7f47ba09e0cff0ba2f8c991b784809c562597590d21647e300c5f1
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://okzawidow.pl/img/upload/files/zexuzilomagagodowajubif.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e8926303---pipivadarukusoneve.pdf
    • http://inter-travel.hu/_user/file/43692164572.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/469b1fae0e40dcd69030d76fdff416f8/24819981567.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/e86cead4220f048cb2828df8ce9d15a2/gaganobuniwolabof.pdf
    • http://altaprecision.com/userfiles/file/gedop.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073ee009a330---bulisifewexejotubozi.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4169ca5593---5062947016.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/31124649989.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/483688dfca2fedef39049e9d5a4fe823/69344084702.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/tuvaxitexaragogi.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160763c9e250c6---90512216740.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/02865967f1dcdb018fa634695f5d7147/nebafesenexijulev.pdf
    • https://peterdegendt.be/file/53831131626.pdf
    • http://cornucopiafrederick.com/uploads/files/75335788627.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160782330a385f---vomopiwawenunenowamizal.pdf
    • http://ncdesign.it/userfiles/files/41775944557.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/uib7poekvrgrgvp48hq8cpe7vd/vupabubatoresox.pdf
    • https://casabresciani.it/uploads/file/10602618857.pdf
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606efa27e1246---jakilewexotu.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/0c127eed2ded5ecf691acb7134442510/73569280653.pdf
    • https://theatresaucinema.fr/uploads/file/51459291572.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/1rak2i92qb56gbi3rm7nqjv132/45143850198.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/653844973c3a13c2f880e84a2f06c408/63832944091.pdf
    • http://akgikorea.com/file_upload/fck_upfile/file/88991931608.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/070899e42eca88eafce92547245069a0/polafurupapenisazine.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=imyfone+crack+free+download
    • 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_off0000eda2.bin
f469f8d1692d021d4deec24bc24ae85da0e50e0e90bf8271e664746b96c4349c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 17060 bytes
font_01_sfnt_off00011a2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2C 16792 bytes
font_02_sfnt_off00013243.bin
80ac7433e36ef51bc8ce3a9f115a1531bc37f0b8f6d7c15cbb96dadcfd8c1d73
pdf-font-stream PDF embedded font (sfnt) at offset 0x13243 10524 bytes