Malicious PDF — malware analysis report

Static analysis result for SHA-256 2114a35699683a45…

MALICIOUS

PDF

70.7 KB Created: 2021-09-20 02:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: acfa0672fef44a735ed20c97eb63f8f2 SHA-1: 360b7bb28abbfb02fabffce816f2686c249e982e SHA-256: 2114a35699683a454a2c2b4805315633866e1c0a62e784dcb2bb07bd009a51ae
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many of which point to compromised websites or link farms, suggesting an attempt to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates the document may also be designed to trick users into calling a fraudulent support number.

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://pistant.ru/uplcv?utm_term=resident+alien+comic+pdf PDF link annotation
    • http://barrospizzadb.com/uploads/files/86192575988.pdfIn PDF document text
    • http://orenprom.com/img/account/file/70702669564.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/45264805236.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/54105690163.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/e79e4b426e2cb6f87d4220ca6c5f2888/94554818027.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/5636808868.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16143124cc0e29---sezison.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/bagajavelukoxeparo.pdfIn PDF document text
    • http://contactfm.be/userfiles/files/niduwatovilonik.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/34476816912.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/numod.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/jepubesipubobe.pdfIn PDF document text
    • http://cosonhuath.com/hinhanh_fckeditor/file/70896001897.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/xamazedukedogajejinatam.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/mifamoredotiwexefoxim.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/rumojiluperis.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147aa5e21ed5---64192665628.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/22509667710.pdfIn PDF document text
    • http://mgbig.com/upload_fck/file/2021-9-1/20210901142003695053.pdfIn PDF document text
    • http://archiwum.wyryki.eu/admin/ckfinder/userfiles/files/74285191038.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/wesoregakuperusakevakudo.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/51796239248.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/bijibedoluwevokexufow.pdfIn PDF document text
    • http://aquitaine.annuaire-regional.com/ckfinder/userfiles/files/nokisakeluzajux.pdfIn PDF document text
    • http://uptownchantilly.com/uploads/files/86050248071.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_off0000b5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C8 10728 bytes
SHA-256: d85d107ab3fdf3d2ab78b531b22b458285769085e64518bbfd6c52e5b8860a7e
font_01_sfnt_off0000ce66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE66 15216 bytes
SHA-256: 6417eeaa23bf392321991731939b50da35887eeaf4516158f3bfce192f035ebc
font_02_sfnt_off0000f528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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