Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac593242d118818c…

MALICIOUS

PDF

83.8 KB Created: 2021-08-25 01:45:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8fb0917a22725161b571a55c2a6e9f74 SHA-1: d260992bf84c49e07b01f8025a0171c72eb4c4df SHA-256: ac593242d118818c2f31edd79a7c878e25a2012e310c3fe97c3aff61711e468e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to lure users to malicious content or phishing pages. The presence of external URIs and link farm heuristics strongly indicates a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 https://coretry.ru/uplcv?utm_term=gerrard+playing+for+rangers PDF link annotation
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeb7eb3bb7---69870892334.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/4221576633.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/tdothokh25e1upnc8nml2o1lm6/pajuwososefugen.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/82456680858.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/bupewuv.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/kerowaluf.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/semefobadadelud.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/90324625921.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/sigidisebasojakope.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771d12a3cd1---65906717808.pdfIn PDF document text
    • http://e-cluny.cz/UserFiles/file/30773295318.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/e8bjjib1tp3k87n7925lqh84e1/75159017317.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/d12d51be0b7dd589c5f509f75645ca98/magomed.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/abc1beb7dbef9d3c572eea09ba4dc5ca/gitotixofakatebu.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/95e1a8a3147d4ca67982ab6706f429f3/79894708677.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/gupokazapag.pdfIn PDF document text
    • http://oskarmak.com/userfiles/file/wubidedasa.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/8709f0c6aa06ddc7a06af0b5576e1ded/gabusunovetimolimozosizi.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160757588ed739---63475583835.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/46766477565.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/97851334504.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/jopiz.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/dorisozawigipepazaz.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-7-13/20210713114247907185.pdfIn PDF document text
    • 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_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 10728 bytes
SHA-256: dca9aa05cc60dbc16f0b20d0bea7e1881c420c447b38ba530e335c6e4adb6313
font_01_sfnt_off0000fa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA30 17284 bytes
SHA-256: 39e2e761ce51717fe6e50917a48674232c3c8b003af3dbd185f44364f0ea6528
font_02_sfnt_off00012731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12731 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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