Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b6b81eab2bff93…

MALICIOUS

PDF

87.0 KB Created: 2021-07-13 15:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9bbc77d2ba3a4c5593db3b107bf56fe8 SHA-1: 44130fcbbe5203d2d693062f894188b6026f31d4 SHA-256: 70b6b81eab2bff938288246bf069e709b86d61bc9bf3ed80bfcf3025ba829194
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. The presence of numerous links pointing to compromised WordPress sites and disposable hosting, combined with the 'Advance Fee Scam Lure' heuristic, strongly suggests the document's purpose is to trick users into clicking malicious links. These links likely lead to phishing pages or serve as downloaders for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crysiq.ru/uplcv?utm_term=free+fire+alok+character+hack
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/329f460856b86cf216e50e7ab5d9030e/51057323949.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/darezapa.pdf
    • http://tubietelbar.hu/uploadfile/22775262066.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbbddc30f0---10695965337.pdf
    • http://bafiti.com/sklep/userfiles/file/46853469252.pdf
    • https://mmagame.com/userfiles/file/97339544490.pdf
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26592386966.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/94m7nbs2a3l09vve1sot482c6r/57855152747.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073f87328d1b---46957131444.pdf
    • http://gocep.org/data/userfiles/files/tixazogaxanabofune.pdf
    • http://lubrifianti-auto.ro/files/file/fitabujexixebepusitobino.pdf
    • http://fine-cottage.ru/userfiles/files/67012968267.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/ccbdgrpumfqnl6eu77u54gjp41/jevurakukiretane.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/438095ff645a10c81f40e4af21aff62b/35656153409.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/d388197e39f68a34f5d5d2bf0288f459/voluwobamaruk.pdf
    • http://chatsworth72.com/clients/5/53/532ec3c8dc0e95779814939736d4df6d/File/funadejinixiwawago.pdf
    • https://altonika.pro/files/fck/file/zejamupeninedosonoveku.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/bt5rk1vsmh2tg4kle290nddki7/8289845464.pdf
    • https://fnb-concepts.com/images/uploads/files/metedavaxezejura.pdf
    • http://placc.info/up_image/20720678381.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da04f85d2ca---tijodilugowofujiji.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/3dcaba500b77f736733d6f51336acab2/39750823877.pdf
    • http://shelton1961.com/clients/35589/File/8577479463.pdf
    • http://emirates-offshore.com/uploads/image/file/73873044382.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_off0000ed7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED7C 16792 bytes
font_01_sfnt_off0001058e.bin
49ac820909f026dba1f468140edd86ccb68f7d54eb3c60ca8de6eb78047af4e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 18144 bytes
font_02_sfnt_off000135a2.bin
1d507952ce3a936aa6adf94972496ea268bdac5176885195ef3d6d9320a10a83
pdf-font-stream PDF embedded font (sfnt) at offset 0x135A2 10232 bytes