Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e09890548e2bf37…

MALICIOUS

PDF

82.5 KB Created: 2021-09-13 05:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0c8c1817ffb780f41c7bd7c9cad37328 SHA-1: 443c82352fb13c02e1352b1ced867d990692c9c0 SHA-256: 0e09890548e2bf37f38d4229654b7ee743d2a0a5bf6f20e0b73524d1999c1464
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of a link farm on potentially compromised infrastructure suggests an attempt to obscure the true destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • 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 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://smidgel.ru/uplcv?utm_term=multi+timer+android PDF link annotation
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/makejim.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/92b9c6b9269558956d05f0a1d9a51fd9/7499684758.pdfIn PDF document text
    • https://ghadir-eng.com/userfiles/files/94596566759.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/47913859416.pdfIn PDF document text
    • https://koratspring.com/upload/file/sipuverufufub.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/ae8d987690a4521c9099a1cdafef774b/39669216143.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/38122106908.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/84774478800.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/dedafolop.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/22407449053.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210912021355.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb27674206---tiwekifixorazuwo.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/tikibojuku.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/90272801074.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/fivel.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/mejezizozuk.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e6b04f87d---30335730693.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161343071cda0d---62923657909.pdfIn PDF document text
    • http://scsychem.com/upload/files/51507082662.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16137e63b0a531---wimanozo.pdfIn PDF document text
    • http://4yoga.by/pics/files/guroxa.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/fofutidodawefepamefutuge.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/93853428640.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/68384960588.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/teloretofotipuvas.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613329499ba88---43260546894.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_off0000de44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE44 17980 bytes
SHA-256: 52e3d56b84f6c3488a080b1b576d54c87d362143c32604c4e0d958cf99cd899e
font_01_sfnt_off00010d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001252c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252C 10336 bytes
SHA-256: 2240388ac223c1aa040f53d75e7f47cddabfc6d5f1e5abd8477fca033dbc7e1d

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