Malicious PDF — malware analysis report

Static analysis result for SHA-256 3494130cce407c45…

MALICIOUS

PDF

104.3 KB Created: 2021-06-26 07:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 59587fba0da1c949d37aa80b7db196bb SHA-1: b7ece73a27b4e61b868caf4e4a67e7ab67cc86ff SHA-256: 3494130cce407c45535df238f8d3fefae620c3a4faa794c42c24c1e52e312920
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing and potential trojan threat. It contains multiple lures, including fake invoices and callback phishing, directing users to visit various compromised or disposable hosting URLs. Notably, it instructs users to copy and paste content into command-line interfaces, likely to execute further malicious payloads via PowerShell or cmd.exe.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://callalilyvn.com/upload/files/14299345686.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a906d24b4ba---pogovekigo.pdf
    • https://finatwork.com/userfiles/file/xurelivoxawasigozomu.pdf
    • https://likeevent.it/writable/public/userfiles/file/gagapitamu.pdf
    • http://yomamasushitogo.com/uploads/files/77417791992.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088af8698b3c---gudebomidufizuzarikewo.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/f95a5bbae5a4a0ad3ff711150cdebbc1/57283080838.pdf
    • https://mimpishio2.net/contents//files/34828748132.pdf
    • https://abofahed.com/userfiles/file/kulune.pdf
    • http://maychamsocda.vn/images/userfiles/file/mekowetuzaluv.pdf
    • http://naitikfashions.com/ckfinder/userfiles/files/nanobazejasagino.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/d8392477b561e49502893dc1246e7916/lodovopepule.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/tncgm8agroecjqvjmtk6drev33/nipufafegezitimoravike.pdf
    • http://randalljroutson.com/clients/44711/File/27099574916.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b773bd94be3---6369971436.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16079547081be9---gakugulamepekebane.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed5a3b0f4b---78718732438.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf509f77cde---vujukuwuxufivinorujez.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad02f5e4c45---69680580808.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1607fab48a0185---xexuvuno.pdf
    • http://aclamerica.com/customers/CMS-IMAGES/file/91619659226.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/a1f285fcce6dcddf4a5c7541beea85f1/favubelisol.pdf
    • https://turismoporsantander.com/aym_image/files/34189689128.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=mobile+phone+card+payment+machines
    • 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_off0001340b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1340B 16792 bytes
font_01_sfnt_off00014c22.bin
bff768fca09c743ace64a766370d4f15189e9634f9f67df1aa1e5a9844bec18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C22 11024 bytes
font_02_sfnt_off00016560.bin
3628560e968e8155be567a4888b424d59868d8c3b6a2a730e96960098b37a06c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16560 17744 bytes

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