Malicious PDF — malware analysis report

Static analysis result for SHA-256 5562fff43606ba35…

MALICIOUS

PDF

100.6 KB Created: 2021-07-07 16:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 265b3a726819e9b9dab020411188ab44 SHA-1: ca27dc8da94e95844e43b7a4e8f2308e80f8adca SHA-256: 5562fff43606ba35308c4d0be7aac55b61145f2313e0575c614f7644e65ca66b
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and link farms points towards an effort to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://chickenwild.com/upload/contents/images/images/26837860615.pdf
    • https://corghialberti.it/file/pixogisesinomulurejiwop.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/tn5a9op0v6ckpnvemdjr2898c2/wekuzozurolunoni.pdf
    • https://koncnc.com/genelresimler/file/31820216779.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ede722b0bb---tugupeta.pdf
    • http://saltokisport.com/uploads/files/13354943772.pdf
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/baecdfff92b711901341c5ff343b2c4a/mojemofir.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/3c2398498465730070cdc2715535b6db/jojifexapifowomusu.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607274c3d179a---90035342394.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/e2j6iv2v0iiofjqdonmtgdvelf/gizowegalefexelotulewufo.pdf
    • http://faxik.ru/ckfinder/userfiles/files/30760408857.pdf
    • http://dragoniresorts.com/userfiles/finoxetera.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/4cdf31c21edb5c09513a68269b6430e1/menutibakexu.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607366042332b---vigatoxiligasasezos.pdf
    • https://bajrahrs.com/userfiles/file/51212723986.pdf
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210612135817.pdf
    • https://semineebrasov.ro/printuri-fi/files/nodasaparimefixiperav.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16076d7f6a9c2f---bivigobidiwodirexo.pdf
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608927a14f588---libomazamumulow.pdf
    • http://ecandrychow.pl/Image/files/jojibureredujukezavo.pdf
    • http://globalbando.com/DATA/upload/files/202106261136544685.pdf
    • https://planet-pvc.com/upload/files/fogekeneninezemoweguzeko.pdf
    • http://bortran.com/upload/image/file/20210702120847.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/9ca87bd0cae363808489b93aabc11e24/74693606292.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=logger+in+java+example+log4j
    • 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_off000124c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 16792 bytes
font_01_sfnt_off00013cdb.bin
2a7a37fb1c27a553bc6511bc26a868e5106b37776b76202a4859be741d4eaf37
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CDB 10660 bytes
font_02_sfnt_off00015532.bin
9178c6a9dc6f63e41e125cbc4e8188b2305786da717cbec9193bfa2f05466488
pdf-font-stream PDF embedded font (sfnt) at offset 0x15532 18288 bytes