Malicious PDF — malware analysis report

Static analysis result for SHA-256 400fe15ee72bf7bb…

MALICIOUS

PDF

69.1 KB Created: 2021-06-22 23:36:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5ab3f2ba83ab807901ba5b818630068f SHA-1: 85ea0eaff644c4f6c328ebf1d0a09b0bd02d3018 SHA-256: 400fe15ee72bf7bbd033c2c293c1a11bc2715bad20b554acf7bfa0f19ff548e2
156 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 a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. The presence of these links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/g6q384172r71k9qscga4eoe4b5/77223853498.pdf In PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-18/20210618025759147897.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/69259553714.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/24700202619.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/d8f7f484a0b64a8b8677128a55a7e6df/91737384646.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/jirobolunem.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/tmhinogok1e21ucc9dknv08sst/jefelurovawalijone.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/peminitugoliwaz.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/35460881090.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-21/20210621030006482031.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/43567825804.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/tutesesiwo.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/afef0accd35ba07bee89eea028d3d823/wezixuxukiv.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/r1vspnssrbjeb4jkusfhihpq7m/57280622784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=jaise+banjare+ko+ghar+mp3PDF 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://scripts.sil.org/OFLIn 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_off0000ba76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA76 5632 bytes
SHA-256: 595f16cde3975191dccc09a8a7c9a2bcb83d15a69d6fe0b37ee8e369fc3ecdf8
font_01_sfnt_off0000cd78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD78 10808 bytes
SHA-256: 1d96bbe448aae654a41e9bd1c250fe29e77a6ab8372a90810729536fcefbf302
font_02_sfnt_off0000f29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 16144 bytes
SHA-256: 18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b

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