Malicious PDF — malware analysis report

Static analysis result for SHA-256 b343eb954a10a0f9…

MALICIOUS

PDF

86.4 KB Created: 2021-07-04 07:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 286d2efd98a74a62a063b51efd7405e5 SHA-1: ad4628e045c5e2d50060b042ff6d1925741b33cb SHA-256: b343eb954a10a0f91f090c42943cae0559eb2a6091c319f9f013ce831c939fe6
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. The document body, though heavily obfuscated, contains sequences that triggered a 'LOLBin Run Command' heuristic, suggesting an attempt to execute system commands. The presence of numerous links pointing to compromised WordPress uploads and disposable hosting, combined with advance-fee scam language, indicates a phishing or social engineering attack designed to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://archism.ru/uplcv?utm_term=the+fallacy+of+composition+states+that PDF link annotation
    • http://lnianemarzenie.pl/userfiles/file/10364908001.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a955869f001---39629135101.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/574d9e732e69609c486f11028320e626/72525299423.pdfIn PDF document text
    • http://allasclub.com/campannas/file/vijoforowopuvitaloxeli.pdfIn PDF document text
    • https://samowar.me/userfiles/files/jijanuw.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/wemomabukit.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210608091241_wiccmd.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3ec6a0ce1d29f2d/File/17030608811.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b3615208ebf---wosaburirukopuwad.pdfIn PDF document text
    • http://3asoft.vn/img/files/5855744127.pdfIn PDF document text
    • http://short-story.ru/upload/file/7592649963.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/wutudam.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/70e202294dc1a75591b09d18aa87aba3/sorobovegaxiw.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2e1fac94b---31317143362.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/2ff447c4a19726d3a1df109223e9c6ed/12369195270.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608600c6ed799---45347213630.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/73577465741.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/56868128043.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/56843702889.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849c68b1f79---romaxazulonumelukekag.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/85154462835.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/eedff7a6447066931ecf696459ef3773/duzejaposobamefosuzimo.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/79f5b9f0508379c538394a80a92e22d8/povofumolubaraloven.pdfIn PDF document text
    • http://r2doodles.com/clients/4/4a/4a4ed909dcef54c1e3In macro / runtime command snippet
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001063d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 17312 bytes
SHA-256: 88ffc6bcaf3733aa099e262d7326deef43348ca7ab5d03816b348f53dcb5d4ec
font_02_sfnt_off00013376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13376 10720 bytes
SHA-256: 8aedfaec9b55b71fc0a47d8f7a7838b8ba41598dab07f87d67ce9642ee1a7338

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