Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead643b9270049d8…

MALICIOUS

PDF

89.0 KB Created: 2021-10-19 06:27:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 504ab08d814cf617b2123ef3706ab086 SHA-1: 80c6d5c72df7f1f9b3e88b439d95cf271e92f690 SHA-256: ead643b9270049d8c3d4651c3264e09fb54d76081d15461fcba0aeda991005d1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm, potentially for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and link farms points towards an attempt to redirect the user to malicious sites, likely as part of a phishing campaign or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://oniceh.ru/uplcv?utm_term=how+to+dispute+a+dominion+power+bill PDF link annotation
    • http://wmc21.com/ckupload/files/divesogupigixifuwegi.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/wabebutipukal.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/zozigawozutedujaje.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/69174731720.pdfIn PDF document text
    • https://yourwebcenter.com/files/file/36551923763.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0a0a6e98d---60825943964.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/50586084539.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/vidufikumadogena.pdfIn PDF document text
    • http://hwangtosidae.com/userData/ebizro_board/file/4235244729.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/80203765603.pdfIn PDF document text
    • http://ahchala.com/img/file/28798143368.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/50032112036.pdfIn PDF document text
    • https://banifatemehmashhad.ir/userfiles/file/33002453165.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/25077610557.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/94514095396.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/46277469609.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/ludipiduperilinula.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613c01713db43---42985162671.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/5gunns6g4fuqqpbjo09f6irkm6/86083149980.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/42689023166.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/80033271451.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/e5c4dce4453f659d42cb7890e20f6b65/sodofu.pdfIn PDF document text
    • https://agermag.ro/mm/file/6468048581.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/59485348398.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/82395481286.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79E 2192 bytes
SHA-256: cfb1580163e84f4efb6b278a67b6d9731dd035c0dfe3fc275b589aeb22e353f6
font_01_sfnt_off0000f188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF188 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001099a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099A 19428 bytes
SHA-256: bf62b359b5430c1ea6177e78ac35d7510858c5ea3ec0cf40b65df78162432961
font_03_sfnt_off00013c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C43 10872 bytes
SHA-256: f99290f3bf149e912f2ec2841ea18552354c9988e4b8c7127a68089f6b06334f

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