Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc5e50903fd5463…

MALICIOUS

PDF

78.9 KB Created: 2021-09-18 15:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 587b11022279a4fcd918363c8e3806c4 SHA-1: 5a9fa1c623eaeb31edbf123231b981418cbca34a SHA-256: adc5e50903fd546312ab9e1581e875004d0ceb217edf02a61cccfc66a489490f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised or disposable domains, suggesting a link farm designed to distribute malware or phish users. The presence of a 'download button' heuristic and ClamAV detection further supports a malicious intent, likely to trick users into downloading unwanted software. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=flix4you+apk+download PDF link annotation
    • http://irodaszer.lukinserv.hu/file/93011244954.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/9999743169.pdfIn PDF document text
    • http://elektromig.pl/userfiles/file/48735047488.pdfIn PDF document text
    • http://ranch.pl/files/file/82744211126.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/kegise.pdfIn PDF document text
    • http://aweibel.com/Photo/file/96048907958.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/2o4m9m367mohtoipk52cqobk96/88168426036.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/sinuwuvuzurisajutisaludaz.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/newukenori.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/37144876706.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/52180022159.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/xegomenimof.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/35934092071.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614329fe7a468---83245694277.pdfIn PDF document text
    • https://www.milestonesmn.org/ckfinder/userfiles/files/resuludaraxuzeko.pdfIn PDF document text
    • http://xycrusher.com/d/files/muxomizevi.pdfIn PDF document text
    • http://cke.hk/userfiles/30683212399.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141c0efe1e9a---tedumibefudofopip.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/81339764678.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/46500609049.pdfIn PDF document text
    • http://pravkniga.ru/files/userfiles/files/5142364078.pdfIn PDF document text
    • http://104408017.linker.tw/files/juposuwutajevaponigo.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/67520136482.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/vimuwevox.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/samazulesasegoxiboviduw.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/96344701174.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11E 17376 bytes
SHA-256: e53647b757bb34d9656317aa30a1728aeb14fc063bbefec10832c6761abd94a9
font_01_sfnt_off0000fe28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001163f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163F 10436 bytes
SHA-256: 29698ea4066a9b699c0ac3ab78b5a4f1c0b3bc608935fa443759b161d4102d94

Open this report in the interactive analyzer, or submit your own file for analysis.