Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc7f7f12c6a5aaa…

MALICIOUS

PDF

83.2 KB Created: 2021-08-20 04:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9a36ecfdf401be94449ab5a4928f85a4 SHA-1: fe1468054d309217d365d9ab04e065c894c26999 SHA-256: 1fc7f7f12c6a5aaac20714d9d69f0ecb120de5c8e944a7d0089972040047b47d
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or redirection to malware. The presence of multiple external URIs and link farms points towards a phishing or content distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://blessingsngo.in/userfiles/files/wixobozunexuvemusivurer.pdf In PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609fde359ccb0---xejopawapalubewivow.pdfIn PDF document text
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/duzudamorufewava.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/0e13e6826638ded0b039f0f9dabd97d7/tadadejope.pdfIn PDF document text
    • http://cy2hand.com/userfiles/fizixo.pdfIn PDF document text
    • https://avphunter.ro/ckfinder/userfiles/files/jisasa.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c49f2d2b0---46222808090.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/fikipikit.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f58dca0002---riketemunofoze.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/c6q1g5aohlddq0av2k7k7f4601/rovafudolefulodebopozabuf.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/70337140088.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/noxajelulusexuvukejoxor.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/giboworabalaganavox.pdfIn PDF document text
    • http://rochesteradams75.com/clients/7/77/774a1ed2e17b5a3c8fe4214cc08eab78/File/60451401300.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160bf081dc3105---gamugojenejuponigofam.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b092b3d3232---87521381635.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16076abb7ca611---xiwozeto.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/28940459160ae713fcf879.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/406910952ae0e46c1e930a8ff54db63b/bozomomugolopava.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/b6b36d3e7348c51ef653db500a0313dd/ridadofigazoruvefoxuba.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/garozilozudoxifozigemuras.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a97e00653c6---23069630872.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160e2fc8632c50---kuviworukaj.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/vofubefagiwakinutav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=unblocked+games+66+earn+to+die+2012+part+2PDF 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://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_off0000df67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 16812 bytes
SHA-256: bb04e64684e3169402fdb562fc49ca9a11c764ac9841f1412fa80a0a0d38b20a
font_02_sfnt_off0001233f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233F 11556 bytes
SHA-256: 0a2dde96f126ce103dc35a073b3a07b0cb980fc81985e43f3ac32d5762485d9c

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