Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e286af13e2f38f…

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 13:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22712fdfaa228a8ce2c3ee5574551083 SHA-1: 5b8a866358c869daabd7487db8324b8f5d5e4c74 SHA-256: 05e286af13e2f38f9cc29ae36cd3101764579c158536da3b033c4125ae3470b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs and link farm structure indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/59599776150.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8af29045---powubixi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e2c5dadf1---pijuz.pdf
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/73631745436.pdf
    • http://aqbnb.com/uploadfile/file/jawifekiwowexaku.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607800502cf9c---gilira.pdf
    • http://sacmacbook.net/userfiles/file/wadopizejekoritigozutakej.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16094bdb57c568---59337269290.pdf
    • http://bjallstar.com/upload/file/78628696119.pdf
    • http://vhshf.de/File/34485790010.pdf
    • https://istanajp2.com/contents//files/xoneloroxa.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/93dfa462199d8178cf4870bfea97d872/55902213875.pdf
    • http://yildizteknikelektrik.net/resimler/files/47875429353.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89a0936646---53933248201.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcc42126ac---fulubiwojemumodoremepalos.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4450808ac1---62762039026.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/aca409df48c876698dc0b60f794b8501/mupegadiwamuridegavove.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb55e9a139---87566479422.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/49f302e500859da8ff881322a1d109bd/fodekila.pdf
    • https://cochleartudaskozpont.hu/files/60881553623.pdf
    • http://nacyc.jp/Upload/file/sotujasib.pdf
    • http://ackerviewguesthouse.com/userfiles/file/78572527607.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e143ab271---43577711742.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b636c37e53e---tuzuwagex.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=if+your+wife+wants+a+divorce
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef2b.bin
c419ac2a15216c62ea328e82a9323ad7f08de37b004190b2346f3a671bc173aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2B 17332 bytes
font_01_sfnt_off00011c62.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C62 16792 bytes
font_02_sfnt_off00013479.bin
a004f907c0b1d3aecfae96922c984c64b59dd379bc0fd043ccbad58ce3833866
pdf-font-stream PDF embedded font (sfnt) at offset 0x13479 10740 bytes