Malicious PDF — malware analysis report

Static analysis result for SHA-256 30aec20dd192f246…

MALICIOUS

PDF

125.7 KB Created: 2021-07-13 20:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 059b29eb056b9087d383abd49886f8ad SHA-1: 96a58bdd05759b04d8b0fcaaa1a593bfca4674c1 SHA-256: 30aec20dd192f246857a413ca428b59a2a6486b9ac81eb9af88dae0a320730bc
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Analysis reveals it functions as a link farm, with numerous embedded URLs pointing to external sites. Several of these URLs are hosted on compromised CMS uploads or disposable domains, indicating a likely attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://biolabsrl.org/userfiles/files/fijizapu.pdf In PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c95ccd163---vapajaputitonib.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb50545d3d---58925778701.pdfIn PDF document text
    • http://congtyvima.com/images/Download/19702022403.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/bigapikimovazogivuraxu.pdfIn PDF document text
    • https://12tiga.com/contents//files/34095353443.pdfIn PDF document text
    • https://hanomanberjaya.com/contents//files/92505410750.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10a54bc8a0---16778085895.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d55dc47771b---54086410576.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081499c556eb---2931583798.pdfIn PDF document text
    • https://ekransamara.ru/files/61905168245.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cf9951dec---vukakubosufonap.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a924276e013---29212821126.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/3e1ecfaaeb2a398eef9e1adef48370cf/sokirusulirafosof.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202163343248899.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/60683954801.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/i8l4ib2klojk4ujok4actkmre0/38565921093.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb4e165d3be---91885774372.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d6d37efcb258335718d7dc27ae799f5b/tipajisilodemuzupofibo.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l6nq0gjf8os9e6mootrfee5vb2/pukulajax.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160839484ece2e---lojuziv.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/jejozagogatu.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d0bd38eb44a907c498890470cfe5a218/fizanafusexonaputuriwij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=proposing+a+toast+examplesPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18BCB 17352 bytes
SHA-256: 466417477e67fd3d4f529bd071baeb1d66a50e7f6baa96c85ea42e3b23de5cd5
font_01_sfnt_off0001b892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B892 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001d0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0A9 10700 bytes
SHA-256: ddd87c895829ea0bbc42ead4be09c64f1ff9c88f6449739e3bb6d807566aee1c

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