Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bb0bd70d60ebdd…

MALICIOUS

PDF

89.0 KB Created: 2021-06-15 13:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bbcd83c615abd08b0f5466c9256f16da SHA-1: 631b59a9bfb69bf4449c92feabc12d49e0a1f5cd SHA-256: 32bb0bd70d60ebdd86b2979fe3f9685eb87dddc1163e30cc30fee08918060cd0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the presence of numerous suspicious URLs points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://synerhu.ru/uplcv?utm_term=ramayana+story+pdf+in+tamil PDF link annotation
    • http://doktor-okonski.pl/uploadimg/file/5536255974.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/i2c9jhkeoimr069u527b1arjfk/fenibubajamubutafi.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/4acba53416c63891d55304c76f536ff5/14536761458.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/zekupalifeber.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f5406e0a62---robosofepakupeluberutorus.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/20597512883.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/33200473660.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160984249cc29e---luduziritemuj.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/316106327.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822bdda5a82---43709100400.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b00b8ada35b---xawuvimoxiketuzu.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d253096bfe---dafade.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/woxepide.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/94330565dbe365d01874e92cfdf143a5/80735579681.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/73506984002.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000ff1b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFF1B 24904 bytes
SHA-256: 3ba237047e93942d0aba2a148d67c78a86162d06c6dbd77883c8d71450d56069
font_00_sfnt_off0000ed20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 5296 bytes
SHA-256: a2de2db4ecf5183517a7699f94305919665e45f8f6a373e2a30d34ed91391f7b
font_02_sfnt_off00013279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13279 10200 bytes
SHA-256: bec467756e4b5106fb15cfadbcb1fc50f29a52c315c007300c755de4260e5fab