Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef080c773b961bc2…

MALICIOUS

PDF

78.3 KB Created: 2021-09-18 15:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0824fdedbc32b5f991a7e32f23e2eca3 SHA-1: d85b7c0f988148a5dff21db8c70c03c9e0c51e80 SHA-256: ef080c773b961bc2fdcd981f0a69971a07af7a985a982b9c33f1c85339f939dc
176 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a callback lure heuristic further indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://crewmak.ru/uplcv?utm_term=roblox+brookhaven+premium+houses PDF link annotation
    • http://architettosbaffo.com/userfiles/files/63202831539.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/6131b7dfb6c94.pdfIn PDF document text
    • http://aescantabria.es/upload/fckeditor/file///nuvutobo.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161377963e2c13---sofajobix.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/gogekemol.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16144833c65d12---fupuwatogufosi.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/76804673187.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133e0b2f1d79---34745130442.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/60685500414.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/gigakunezixedevewivujuz.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/35735067772.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/xigisazanejoloxoxop.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/jomunepidi.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/laxefom.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab4e772935---38599123592.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/325677cc066d6ab274782714ec540762/32661369648.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/3307931624.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/datubebiberizi.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/t7kahkqg69kvj0ae4629milh02/16080418311.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/13575871700.pdfIn PDF document text
    • http://serting.eu/userfiles/files/zofupomowiwekowotuvufedor.pdfIn PDF document text
    • http://pokrowce-ochronne.pl/Upload/file/zutosugugenosugad.pdfIn PDF document text
    • http://www.beverburcht.nl/upload/files/61964091266.pdfIn PDF document text
    • https://kompaspt2.com/contents/files/gokogozurusakupata.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/99201282052.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_off0000c31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31D 10964 bytes
SHA-256: 4ff38bbeabe7ccb90d04bea4a9f484d4fb50656745715a9452d8efb8cffc02c7
font_01_sfnt_off0000dc31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF443 20320 bytes
SHA-256: bdc8e1a7c247d561eb699e04f83f47a9a3bce1f4e4e491c0a95551f3043df984

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