Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b943f214865915…

MALICIOUS

PDF

71.7 KB Created: 2021-09-25 06:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2cd2d82b2d07780aae3f20a280e26336 SHA-1: b467e655e2ed3d33919ee782d0f0401c792db7db SHA-256: e0b943f2148659150868d0dec7d986f99a40857a5ca9f843dbb241eb41a93d7d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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 http://robertfeinberglaw.com/images/edit_images/file/penesakilidixojozan.pdf In PDF document text
    • http://sportsclinicwest.ie/media/contents/file/jisetumodijowubeku.pdfIn PDF document text
    • http://byecook.com/ckupload/files/23138887397.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/66777679712.pdfIn PDF document text
    • http://scsychem.com/upload/files/52630365563.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16131439701a7f---zikileruwetad.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/kbs2f8e4oc18aarebh8c6dijrb/62857091674.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/30868905339.pdfIn PDF document text
    • http://www.heatandgas.com/EditorImages/file/zugosarasiwikusomaguvese.pdfIn PDF document text
    • https://baobiachau.com/luutru/files/mikawizon.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/96995338904.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jokeweloko.pdfIn PDF document text
    • http://www.kigimex.com.vn/ckfinder/userfiles/files/47303293202.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/86890846400.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e1010a3e2a---46009454715.pdfIn PDF document text
    • http://runo34.ru/attachments/file/wilimojepakitasisagi.pdfIn PDF document text
    • https://tavio.ru/files/file/60202341651.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/rixejuz.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/jumuzemusonafokez.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16132fa84cab20---vunimomojiwidofogovivevad.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/rulosowugajori.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/44716663258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=good+night+wife+shayariPDF 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_off0000affc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFC 19036 bytes
SHA-256: 8d179d07be86c7e5d4e175066badcf398dd8606128c8f8bb34e5635564d9715d
font_01_sfnt_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DB 10824 bytes
SHA-256: 37656a3faba76fdd27c392faf42a76324343baa18a19eeb25a5225c257a60146