Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22de7f38416a320…

MALICIOUS

PDF

68.4 KB Created: 2021-09-29 11:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 701b322149ebd5159a17f266f2144932 SHA-1: 60d1ee68eb36dda06c7bc7e3ab34e61017eec045 SHA-256: e22de7f38416a3209ec6db132954bf5dbea60fac59863817fe0d24870ae09548
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification further support its malicious nature. The file's primary function appears to be redirecting users to potentially harmful external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://inwebjor.ru/uplcv?utm_term=ios+12.1+emoji+apk+download PDF link annotation
    • https://planet-pvc.com/upload/files/86518148509.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/48159693306.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/17413407186.pdfIn PDF document text
    • https://kimcert.net/E/file/32649403407.pdfIn PDF document text
    • http://hexindechem.com/upload/files/wididopewonamonul.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20219191937364502.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/dojetejumivabage.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/34612123671.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/mesupi.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/0c833fb7a780e120105df78449c0204a/70165559349.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/lusarugoxumupapifu.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/77351887225.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/96759663933.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d06917faa---dedikebenenoxitegumak.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210921_7B6C56547368593A.pdfIn PDF document text
    • http://iscelenie.info/files/file/20580904690.pdfIn PDF document text
    • http://thesei.com/In PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/84940840622.pdfIn PDF document text
    • https://profesa.net/userFilesfile/50247780795.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/11653063254.pdfIn PDF document text
    • http://stefani.cz/fck/file/pinazimijeruxadixuso.pdfIn PDF document text
    • http://thailand.metten.dk/ckfinder/userfiles/files/23285585748.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210906_F400AE3311E7630F.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/437dfd8830723eb46fb658367d63f31a/57767494656.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_off0000aee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F5 14280 bytes
SHA-256: 23aca3cdceec2ca659c190a5e0828d889ad722a85050d375766742dc281d41a0
font_02_sfnt_off0000eadf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADF 10852 bytes
SHA-256: 36abe67767ac287596b9088627579973c006dc35518d4552c70a5b5c96e3c730