Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e97ed9f4f9e1b6b…

MALICIOUS

PDF

128.0 KB Created: 2021-06-27 11:43:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2bb8b0097ca86ee3898d944988091b7c SHA-1: 88ba922fdb22b5bebdb7a74161bde0824ed937d4 SHA-256: 1e97ed9f4f9e1b6b6423e2a8f8701ac314c5342a0d6a5d52a84739c368cca056
156 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, with several hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to lure users to malicious sites, potentially exploiting vulnerabilities or tricking them into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://advance-pack.com/editor_upload/file/zojawewubovu.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/3k4dsj31kt5fg84fq5l2bog79i/netinitumelivafasejusofo.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/4mqlb2u7bls0f9kftf9kv4juvg/dapekijebevapos.pdf
    • http://eperon-kochersberg.com/img_db/51790685080.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/ono17vu2gb459jok3p81gqrikg/99987724935.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608fce940e377---51709781206.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075578000f78---51436111171.pdf
    • https://atcotourismtravel.com/userfiles/file/xifub.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce14f2690af---gogikuruparewigotugu.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/qecq35uud9rbdgkescr74q2bbu/xelisuluzajim.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/7efb5eafb800028dba17eb559d61027e/gubopujevegugeramatebeja.pdf
    • http://ciarajewellery.com/editor_upload/file/lawotafug.pdf
    • http://sattamatkapatti.com/userfiles/file/73224231817.pdf
    • http://nadiadsa.org/userfiles/file/nidakivo.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/b14b75f67a437b7b42ba414081420c71/vuveriviwujotisu.pdf
    • http://volamtuyetthe.com/userfiles/file/zupen.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/13cb1d51093b836f6f73eae62c8795b2/91338589123.pdf
    • http://4bx.pl/public/file/16779675672.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b01c77086c2---fanubibizuloketejilola.pdf
    • https://acryl-bg.com/userfiles/file/wupuxelenokuvexibujupedux.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/0e88hrpajeb10q7o41dcjrjcsi/28416742205.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6df5d91ba---54103631672.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084b69855eb3---ramerewufewopasukodunuj.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/muzubiriranogaxopako.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=gta+san+andreas+download+pc+highly+compressed+200mb
    • 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_off00018389.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18389 16792 bytes
font_01_sfnt_off00019b9b.bin
99e3b220ab763c83a212cfa1600d77ae270bbbd2561998006f5b1fb5eb48bf63
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B9B 22176 bytes
font_02_sfnt_off0001d58a.bin
9aaf97af9c21f5b54583052f03a786ba7b0958b1c673a94aac67af3dbd4ef899
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D58A 11580 bytes