Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded7b56523c40977…

MALICIOUS

PDF

83.4 KB Created: 2021-09-22 17:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b5bf7a47b6266186d987416c902a617 SHA-1: 27669eaf81f1e8bf80004c5bb0b41f2d385221d1 SHA-256: ded7b56523c409779f1eed64abbf4866aa227710d6929876eb3f7929935f50e0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure strongly indicate a malicious intent to deceive users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://allytemp.ru/uplcv?utm_term=wipe+stolen+android+phone
    • http://gongotour.com/FileData/ckfinder/files/20210908_55E9DD3A04A46464.pdf
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/81050583095.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614579d638723---62287930920.pdf
    • https://abzesolar.com/uploads/files/76161436097.pdf
    • https://skiclubraonbaccarat.fr/pdf/12602904690.pdf
    • http://bannhuaduong.net/upload/files/bimamokufalexidisov.pdf
    • http://er-trans.com/img/produkty/files/dojukudivevukamajegabex.pdf
    • http://skiflogistics.ru/userfiles/file/zenareremitixixutavax.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16147c4843e696---9851143113.pdf
    • http://xinchenfast.com/upload/file/lizufadisimovekax.pdf
    • http://chalappuram.com/userfiles/file/13504923413.pdf
    • https://mercerapparelss.com/userfiles/files/lugatevoxer.pdf
    • http://www.kotolantopeni.cz/files/51213197285.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/u6p3v2i8jpqau94g3gber7qdmq/50930804435.pdf
    • https://hgb.se/filer/file/nugesivikoja.pdf
    • http://emilygrilltogo.com/uploads/files/vekasifopogiko.pdf
    • http://sarigol.kr/userData/ebizro_board/file/vekopamezogala.pdf
    • http://fcraregistration.com/UploadedData/file/zokakedojijamafanug.pdf
    • http://c2r.su/uploadfiles/file/2021091515583073499.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141a5d199e2b---69157202115.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e23e.bin
f80882ed8c31a397d4f78f54025c3eab6c5d30322c5f7ad4f0217a1dfaf3e786
pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 10480 bytes
font_01_sfnt_off0000fa01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA01 16792 bytes
font_02_sfnt_off00011213.bin
97a1c4fe85cf1a0cd1f21ff1dbb9ba3c2128e6fc9362c64d958361f07f86f72a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11213 17816 bytes