Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e43db49f886aef5…

MALICIOUS

PDF

97.9 KB Created: 2021-06-29 11:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3a13b5d2ebdf9db2fa2e41ce90cdcbd7 SHA-1: eff6cf65d00076c1699f77eda13328ebf462790a SHA-256: 6e43db49f886aef56a9f505770f3a6d7c723b40f0a69753b312b857af1aa6603
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various websites, including those hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9716

Heuristics 6

  • 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.
  • 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://pistant.ru/uplcv?utm_term=definition+of+dissimulate PDF link annotation
    • http://cjatkinson.com/userimages/fowuvijixepigova.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1d69a7b2---gesatuni.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/55669797610.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/26301634938.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/85379063356.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf9eb56bd---navel.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/645fe4774359014329ef0cda3cb7c50d/66187513709.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/sipiledejex.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210522064756_620636415.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a54c5b81388---lekexozumabopekim.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/968a2eed1a9e4b323195c56b3dde2127/20583563489.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc81d8ff9c---watusugevesegiposowona.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/zozewiwaf.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc8fe91d8---61288347982.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/e525a31d611023ca14bd3da88720a6e5/kakogatakapubi.pdfIn PDF document text
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/bobawikuvoderatexinafodu.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/c12079c16838a5f2bcb1368506dc5eec/17877218596.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/138925391060a1c3e965090.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/xenoragodanatulunoros.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/44988601839.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089419663303---64525345872.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/8253ba944f8d4eb111b305673611ca4b/fatuvodizesav.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210609_CFA35BF06371097E.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/26584486571.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014e1a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14E1A 18360 bytes
SHA-256: 0185d2ac674f82d20b14138693fb59c29912ac4c6a1acdff92a79c250ac71cae
font_00_sfnt_off0000e27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27C 23996 bytes
SHA-256: cf0d1138926032e255318da69bb23667fe826cab93eccdddeaddfd12ff32ee7d
font_01_sfnt_off00011e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13631 10516 bytes
SHA-256: 457942ffbfcc788004fc7b5cbadf58845b954a2a3e96f05634db2f0ad05d94af
font_04_sfnt_off00016bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BD9 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff

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