Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4804ca6186e61d0…

MALICIOUS

PDF

89.4 KB Created: 2021-07-20 08:55:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9480e2615eb3d45ffb47e83e026674b4 SHA-1: 9cb919c889b547fe6c87af2d9b14ea180c14595f SHA-256: b4804ca6186e61d0915d3bdbb095cb4cb42cd02726e2ce34cbf9680cbe2d72d1
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting. The primary purpose appears to be directing users to malicious content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/nk9frq8g9e3m6mom8d59ne96a5/jujigejopogilagezovupom.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/djqk0kfafvg436h3t4nksi0kv7/39148683294.pdf
    • https://samudra99.com/contents//files/5813375126.pdf
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/rerazesikilajoben.pdf
    • https://almondzwealth.com/administrator/imagetemp/file/3471062603.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160bda14ce9811---60831144348.pdf
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nuseker.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e129be394a---toxunole.pdf
    • https://cr2tek.com/userfiles/Proj_Name//files/38370955873.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/745c57e228d8898f0917c41f9e285719/tizur.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/0de920903f6951c0fed1e17782dfc672/kosibavobotivopobapomib.pdf
    • https://facades-metal.ch/ckfinder/userfiles/files/mekiwakutoboxixebas.pdf
    • http://energo-winstal.pl/userfiles/file/4537957028.pdf
    • https://lescourailleurs.com/upload/editor/file/bazukajurimezalawoxewe.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/5af15045a5d018051a3a216b267cf26a/xoxarupejufolikozeji.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/867935609.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/90bafbafed607e81447e23a9eea2ef46/xevakekagirinowaredono.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e50e213f0e---kuxonekif.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/spoj7ro7dlm9gvadomsec9ff6r/nabupofajusoj.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e99002dcaf---84270173332.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b7698c26cb1---86228129401.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/jv2lq5coi66tq4jkmq0e1a387h/19395267953.pdf
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/pemofolugibirofujefuj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=all+organizations+have+two+organizational+systems
    • 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_off0000fb20.bin
3bd507d9d3245365de0c6a0c2015129cf51615d48b634ac0ca6f67f32b7620a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 10860 bytes
font_01_sfnt_off00011421.bin
63d28a8d44f69a901f97c7daebfb30e16aa544ab010c1522f36bab4a107683b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11421 16904 bytes
font_02_sfnt_off00013ff1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF1 16792 bytes