Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64d9138704a66c9…

MALICIOUS

PDF

133.1 KB Created: 2021-08-04 01:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 92acb13127cc5b97b794268b92aeed0f SHA-1: 004f133362763274e3f87445fc1fe6d62e020cb9 SHA-256: b64d9138704a66c99aee101189f6a16e7a72e45afd169705379655b09338994e
176 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f15f3789b---vufisikujinejanuvu.pdf In PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f082e56334a---vukufa.pdfPDF link annotation
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/bm2bg7b8qvcp870fmfuq3f9ku0/soxumobiba.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/4ri02b7i04059slodaee118l22/pewel.pdfIn PDF document text
    • https://mahae.hu/files/files/70134731323.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160e929fa9c6f8---26325455496.pdfIn PDF document text
    • https://bauarch.bg/files/pebenupawidofusoseloma.pdfIn PDF document text
    • https://sindhuinvestment.com/ckfinder/userfiles/files/46281224146.pdfIn PDF document text
    • http://holzbau-napetschnig.at/witaritumatakili.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/8a8dc8a405059e19e8003dcee9ecaa09/67432367373.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/71538422556.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/17661764571.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce260d2b86---92516441114.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/oqdnfpcthvfuch74m9gudjfdq5/34595849445.pdfIn PDF document text
    • http://tuzlakart.com/files/xerakarozanovofatiwu.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/55487171456.pdfIn PDF document text
    • http://remobudostol.pl/pliki/basuxodu.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/bizixawitejawutivimum.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1625031862.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa70d0bb42---37445597277.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a0f5d0e80de---xupiximidadovaneb.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/kmssena9930ipt15ompfli0dje/76603314496.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/josefa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac4b432a9a---90901010656.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/f1b1e6d8e8251a79fbd42170012a1da6/33530600078.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=google+earth+flight+simulator+appPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000196f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196F5 2280 bytes
SHA-256: b90156f80c073d5a5efc3d4439a36622105a5ea42929b519e6408bc4151889b5
font_01_sfnt_off0001a104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A104 19400 bytes
SHA-256: aea72ca03320198847637bb8a21bd8fc96b4d12e3f8c3a2f7ae52c4046058d6e
font_02_sfnt_off0001d401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001ec18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC18 10840 bytes
SHA-256: 4fd45adab6d24e5938f1973428148b29272a8b2cad75ec13037e08a84ec3b619

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