Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a9cf02fc0136d0…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 02:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5cd12441e2f47cde304b98697c080653 SHA-1: c0ed464705a5a8d048da69206445b11eecd6b208 SHA-256: 12a9cf02fc0136d062b64044756038dc8826b1510658fa67eada37db78861e64
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to various domains, including compromised CMS uploads. The presence of multiple external URIs and link farm indicators suggests an intent to redirect users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://promise-land.com/upload/file/wemujifomagakedi.pdf In PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/50056087948.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/sonij.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/lomabimopadewobon.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94da4c164---donedemovalenozepapuso.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/lamedotozugovulugete.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/24777377679.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/57308427263.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/12806534024.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/panaxu.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/38404730275.pdfIn PDF document text
    • http://videocycling.info/files/file/14917823620.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/32oe1ahpdvcu96224fbsc53j18/keliludevititodisugodener.pdfIn PDF document text
    • http://unitec-egypt.net/userfiles/file/34495700635.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/jegebesidaxowovowu.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/54644015150.pdfIn PDF document text
    • https://andrejc.si/files/file/44364822324.pdfIn PDF document text
    • http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/83740366635.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1611ba4106acc2---midux.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/56476714212.pdfIn PDF document text
    • http://ozona.pt/wysiwygfiles/file/wobukisavevaruda.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071da040bce9---dulowizogerugot.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/dexiwu.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/34712594441.pdfIn PDF document text
    • http://alkanboya.com/files/file///65587142802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=soccer+fitness+training+drills+with+the+ball+pdfPDF 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_off0000da80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA80 11200 bytes
SHA-256: 675dc6b2e54b2b04a2fa6cf7e3994c3cf50c6afdbe52a8131b41308405342e01
font_01_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 17952 bytes
SHA-256: 809818f5af550e3409abfe109ba9634c2af53f75c307cf1d403c22ca4b504ebc
font_02_sfnt_off00012268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12268 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.