Malicious PDF — malware analysis report

Static analysis result for SHA-256 9299c4948b631791…

MALICIOUS

PDF

101.0 KB Created: 2021-07-03 06:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af8ee7a8deb16d461334224b5c530277 SHA-1: 0de74d3c555809cbed1d8db0c20c33b60e793429 SHA-256: 9299c4948b631791e5c40b0c6c9f20f736d8da73139b12b5ab7aefed4ad0c25f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm patterns, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://cructi.ru/uplcv?utm_term=famous+song+chord+progressions
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/o8vlc6ferca708os6caqdb7kur/35001115184.pdf
    • http://ahkjt.com/upfile/file/gogusiwetozimom.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/a4fcb1a5f202069246e359caae88a1a1/65791169940.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e624cc9708---dasujovegulikakode.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/5cmrvf9q3sqvmph3ps8ctfdt4t/90390515001.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/036a13eff1208dfacbdc73672f3ea132/pivafi.pdf
    • http://sattamatkapatti.com/userfiles/file/3489439158.pdf
    • http://pinetreerealty.ca/clients/55933/File/34780771585.pdf
    • https://alatheir.com/atheirwsfiles/file/mowapuvalibozupibeba.pdf
    • http://bualuang101.com/backoffice/upload/files/bubep.pdf
    • http://vimbark.sk/editor_uploads/files/wutizadevuno.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/0oij64uu4kleabcfqm92nj4p43/dexuzunigumufazaxoxezo.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/adc8683a59889898cae40ccd34039b75/92459636574.pdf
    • http://xn--eyt274i.com/upload/files/kisolulefezerogagir.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/59t94dvqcoi51ce31lohdlukei/todujotoxipinulizupovop.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210619_0E67A5743AC970A8.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8d69490de---ronojujavebaxibirexem.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/5mqlpmtkpjolob72do0hb2pnlh/pusenivonal.pdf
    • http://al-bandak.com/userfiles/file/27451846359.pdf
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608111509bdad---zopifagokozetitadalebemef.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_off0001259c.bin
9ce95b5ec0f932d8bb3cdb84ae750921f6672d821097a98b701a8ce48713aae2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1259C 10892 bytes
font_01_sfnt_off00013e58.bin
6ecf6e0ba6e8b0cd7f4e02aa96562ee0d635759deb2fa349fe354db7852a2baf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E58 18512 bytes
font_02_sfnt_off00016ee7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16EE7 16792 bytes

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