Malicious PDF — malware analysis report

Static analysis result for SHA-256 200e977e01dee403…

MALICIOUS

PDF

87.3 KB Created: 2021-09-06 09:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 23761fa7989f8ae85781983330893d41 SHA-1: 1dfc7df9adf5aa6073a27c0848b9a477af7bcc5e SHA-256: 200e977e01dee403b4b47f6de99483ba933d622d32f9ede138199fd5605af61a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The 'SE_CALLBACK_LURE' heuristic confirms the document's intent to trick users into calling a phone number, a common callback phishing technique. While no scripts were extracted, the document's structure and numerous links to potentially compromised CMS upload storage suggest it acts as a lure to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/c76d3e8dd029b3672be27f48293f1679/patiw.pdf In PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2c0a53f6f---sekivanusoja.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/97f984e0d11980817ed53fcfee143210/wofofevivawuduvefejiv.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/j80vn7vob19veo9ubqklah59rr/94049214847.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/29094334122.pdfIn PDF document text
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/56db5d266b4d268a2125bb8a4b02f6dc/xezav.pdfIn PDF document text
    • http://gonuldoviz.com/upload/ckfinder/files/pajaxisitosamebukako.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/82190008440.pdfIn PDF document text
    • https://clic-essc.ch/ck/ckfinder/userfiles/files/rofuxawifubodikokisilopa.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/tudisage.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/cfb1d56a2909786bc8bd25e67592cbb7/xoseserojazofewategitalar.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af8da36c843---74898278919.pdfIn PDF document text
    • http://atek-ent.com/upload/file/zurura.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/raporixu.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/6157007710.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/r4j873od9dbssetm7inc7vamu5/31318802992.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/2lea0semsgn1e23vanlg0h7m61/turikerofonedepekamaj.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/56762500673.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/jupijiziredutixar.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/95384489278.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/161284eee56d41---58949777948.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b7c1e37de---patomamofavemosofexu.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/c5ni4fm4vmmcnl3nvjd0s47kg7/80757172263.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160942c95f22ab---59088474890.pdfIn PDF document text
    • http://dezmaster.com/userfiles/file/81405274133.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2a9b1d987f81aaeefa52c4eb4fcf312c/32689057766.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bromatologia+mendoza+pdfPDF link annotation
    • 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://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_off0000ea60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 10784 bytes
SHA-256: e451e4e862269412a1c37fd1138b30ba09c53f66b3fd4c80c420c3a1b443cad4
font_02_sfnt_off00011b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B17 21512 bytes
SHA-256: 02a8c7b374a65bbaace66e0ef7dcb959bbb4fc4317ab6d2af835d7712b6bd88a

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