Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d54fa2bddd834c…

MALICIOUS

PDF

74.5 KB Created: 2021-08-29 20:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 44b98d04de999aa947509b5eb22b44a1 SHA-1: bb5702bf745b93c30d6d37c18c3481ea0fae55b8 SHA-256: e0d54fa2bddd834cdedc22855fa249b7ee7ff11cd3062cf663650902a89b7340
176 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the PDF contains a link farm pointing to multiple compromised websites and potentially malicious PDFs hosted on these sites, including one directly on an IP address. The presence of these links suggests an attempt to direct users to malicious content, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://diysmart.net/userfiles/file/ronimezerigedesijun.pdf In PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/76da88cdb43d842cba81caec896e45bc/57816654490.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612667ecf3c97---sosinodawebarikavir.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/a2e52f3aeafc6de714a8562e43255a31/5619786577.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/68430786590.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/3252811136.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16123ccd05bf73---40180017253.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/bavabefotulutul.pdfIn PDF document text
    • http://daiduongmetal.com/uploads/ckfinder/files/tesututiwoweg.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/xiwumewupidu.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/59551123530.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6996b23cc---werufitixonot.pdfPDF link annotation
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e55867970ea---bujiroserewaguki.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/wefaves.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/i64tv1p6j4da1j1ivpetisddb4/18346574255.pdfIn PDF document text
    • http://studioriboldi.eu/userfiles/files/wefajafana.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c347dcd24d---43739167827.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/puvamujulidezetalomi.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070c4743799e---muwukalefawenesuguw.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a471361a2---tamezifunikelurex.pdfIn PDF document text
    • http://bivalyracing.hu/files/file/bubuwolo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=township+cheat+codes+2020PDF 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_off0000bc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC4D 17664 bytes
SHA-256: 4264ac000f22f77fa05ff4d2d9cb565cb37db5caf4d446b1a6b54be02b91e654
font_01_sfnt_off0000ea5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5C 10756 bytes
SHA-256: 52a3cba03b458b1eb95813d0f0a4d1f07a91938f201e9a4586b90300c20b7696
font_02_sfnt_off0001032e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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