Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c75ff132474be0…

MALICIOUS

PDF

83.1 KB Created: 2021-09-18 05:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3debb7fb87d72169eb563ed98da411f8 SHA-1: b38a23641ca9df47e4f12cacc1bd416623bd23ae SHA-256: 49c75ff132474be056bf93be584fad111a21bd76fbbfc8e18b99fca2fc085918
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure victims into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=text+killer+app+for+android PDF link annotation
    • http://easy-sleep24.de/shop/images/editorfiles/file/nibadutamu.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/9ade88a1dcd5d37b6105e3b016ecb8b4/zufutut.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/meladevesusuvis.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/ralepowexatupimelodurupez.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/72882649507.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/61441047447.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/belubazusadi.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/50415489819.pdfIn PDF document text
    • http://cuadepthanglong.com/images/ckeditor/files/62634894512.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/dekefulixijusalo.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/36003739807.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/17097208457.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/fcccc5f375e1f6ab2c444b110b507c36/katetudefojiwotuwojok.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/masitoxomumikitonulok.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/toxuriwalosonamavi.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/nujuf.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4d79798a7---pujabipotitewasuketilipi.pdfIn PDF document text
    • https://nasco-ye.com/uploads/file/rixugekixuneridokanaxa.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/2209667025.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/dukapox.pdfIn PDF document text
    • http://poiskvod.ru/images/file/83368260360.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd0a96ec24---25748382476.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/84431686760.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_off0000dc2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2E 19188 bytes
SHA-256: f8aae37b2889498d360c0471f9c773afb16604a03f4aa798abe65d301e36187f
font_01_sfnt_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 10480 bytes
SHA-256: a86cd15a433e68ceee4fb0a098737d0e8b7fc92e769b42380455a9a43398f572
font_02_sfnt_off00012733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12733 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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