Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cc713b92b03f2e…

MALICIOUS

PDF

129.4 KB Created: 2021-08-02 11:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 860994840c8e195f27e2352088bc23d6 SHA-1: 63e718b93598af8cd751d00f91aef029270e2bb2 SHA-256: 22cc713b92b03f2e6375ee074c0ac923e7601dd2db16aaeda59b53491aea81e2
196 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic strongly indicates the document's purpose is to trick users into believing they are receiving a prize or parcel, a common tactic in advance-fee fraud. ClamAV also detected the file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://shengnabei.com/uploadfile/file///2021060317505540.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/f5065c9f76aa1f4325f415a1ab1379a9/dekagabuwodevuwevimafewil.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/c5450af81672a925c582ddaca598e88b/sumudunor.pdf
    • https://flyingfish-stay.com/userfiles/file/38620108812.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bcc66a629---tiposuvefezaxelulidi.pdf
    • http://driver-jazda.pl/upload/file/21555912447.pdf
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/18412511747.pdf
    • http://candientuvibra.com/images/file/38252965404.pdf
    • http://qtjdb.com/UploadFile/2021/05/24/file/20210524_144252_171.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f664edb0d---nimureriguvoliga.pdf
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/722p1j9392vuvimeimec2ukgv4/30405442845.pdf
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/274524573f3c6b78175bd0ad0e50187f/3294448763.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1d9fb91c37---81171308456.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/1aa1b419eac49544a91b98b6f291741d/fadaxidegafuxofipetojax.pdf
    • https://zohopinler.com/calisma2/files/uploads/64012966882.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a4fbb5dd---82978612954.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/b263ce0ec353860511a831d003e322e6/61186428814.pdf
    • http://criollo-cocoa.com/userfiles/file/18101402681.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c974b6bfde---31192806677.pdf
    • https://dynasty888.com/image/files/20210604_145300.pdf
    • http://ballmillfactory.com/d/files/87438162051.pdf
    • http://www.lugashotel.com/data/editorfile/lutitodizovo.pdf
    • http://dzbnf.com/upload/file///41231004500.pdf
    • https://digireg.dk/upload/85769325899.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=download+harvest+moon+friends+of+mineral+town+bahasa+indonesia+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001d064.bin
d177d82c429acfc082d255bc7bbe928df7f5c3c89c53ec31b4bb2fec4617c087
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1D064 17804 bytes
font_00_sfnt_off00016724.bin
ee87038ee493ce9cb6d7ddb916bfa09ac52b35297a5b69b0483b8948de8b331b
pdf-font-stream PDF embedded font (sfnt) at offset 0x16724 10912 bytes
font_01_sfnt_off00018040.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18040 16792 bytes
font_02_sfnt_off00019852.bin
495fa8c6f52a66669004d4141ae521ea7874af7ab51dbefaa6d085214536fca5
pdf-font-stream PDF embedded font (sfnt) at offset 0x19852 23312 bytes
font_04_sfnt_off0001ec24.bin
7df7fa2e82cc03cc78273e3ae6ee1528e6bad376c331a052362e43ffef5c6963
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC24 2296 bytes