Malicious PDF — malware analysis report

Static analysis result for SHA-256 24560083b1dc1df5…

MALICIOUS

PDF

83.0 KB Created: 2021-09-03 13:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 49bb3b1c2ebf163aa787ccbc8cdf307b SHA-1: c322ade4e240c388213102902993d2018442f2f6 SHA-256: 24560083b1dc1df54a0dd7e5e7b95d14ff806e002fadf09c16e62bc60586fbb2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or used for hosting malicious files. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam pretext. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://krisoc.ru/uplcv?utm_term=democracy+in+developing+countries+latin+america+pdf PDF link annotation
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/9defdfa57234f6a87e9164c34cc8c09f/27581442559.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/94036314908.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77eb5693fc---jivegemigirulizonixamope.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/50882884707.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5f5f59f32---82699080994.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/fodatisikeges.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c359328072---28460832052.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/50241647535.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16071078603ee9---fizepuvixuk.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/11502690837.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160e7e85dc9d59---92663457603.pdfIn PDF document text
    • https://imagebuzz.net/ckfinder/userfiles/files/74767657710.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/tediwoguser.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee37f8901a---jinurununapem.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/37495066665.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161270d9eb7978---36665720700.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8d87426385f3c77cf1743cec83a138cd/72871763101.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/dunixemo.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607100426f9cc---88390780046.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/d69fd681d5712d6839c3b1591222c654/39232172881.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/rezulijagubol.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/88481226907.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_off0000dc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45D 18496 bytes
SHA-256: 2091eed864622de9244ee56c51646d7f2227a1d9ad8898daccaf2f8be47aad3e
font_02_sfnt_off00012396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12396 11244 bytes
SHA-256: a1591c620cb7bbde13266495a21516b68564c81bd687eac0df9f3c9859f15968

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