Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f2205fbec39c5d…

MALICIOUS

PDF

78.3 KB Created: 2021-09-04 20:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3620a17caecfbde84a3d6666cc967316 SHA-1: 037d7ff4df1e9f8e1e77c022f9b23f9c0c287c9f SHA-256: 47f2205fbec39c5d0922565949226d6741bf33a51e02ca9f4ec28cc22b147cc7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://capitolmetrophysicaltherapy.com/userfiles/file/2237591611.pdf In PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/98a13f418b9110972f6feeb256604c3c/migobotivero.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/31779186987.pdfIn PDF document text
    • http://sireny.net/share/files/28297561837.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcfa71420c---45451303264.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/11377921936.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ae266a6deac---jagonirowugugotix.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160afad7257aa8---metipufepidas.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/f07b8ec39f9cfdb1cc1f0878166a0d75/99588826342.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/dafuxubazigozeboxezimalo.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/28145168137.pdfIn PDF document text
    • http://cameradungphat.com/uploads/files/wopowisawuru.pdfIn PDF document text
    • https://dcmheavyequipment.com/admin/images/file/jufigewunosexef.pdfIn PDF document text
    • https://smallislandcurry.com/wp-content/plugins/super-forms/uploads/php/files/d12e8885ceb4db91556a93490eca3daf/jiraku.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d11bcd084---zuwiwa.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/94745690474.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7b91a9300---9746207805.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/netate.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/98581221932.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/luzimorizowufimiti.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e4977d482---sodotoxumuvegopuzo.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad8a81d2a6---11446728796.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/30585584855.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/vukigujatubiwu.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/75608515823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=scoliosis+assessment+form+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://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_off0000cfbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBD 10856 bytes
SHA-256: a9166349911a1383d6b0cb0a6127953dd881d3bbcfc890271daf9d035d27434b
font_01_sfnt_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 16600 bytes
SHA-256: 02b9d36b34bfcf693ad142cdd2ebe16dbf461bb84e2794b678967df9657607e6
font_02_sfnt_off000112ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1