Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ce7414b4b4c886…

MALICIOUS

PDF

89.7 KB Created: 2021-09-04 10:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fc09808c253eef01b162fdbf96dcd362 SHA-1: 183a11d5727bd85100dd36c854105433349cf8e9 SHA-256: 21ce7414b4b4c88634dfe3254619214b108ddd8cce03355cce1d4b7e47a69dc3
176 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing lure or download a second-stage payload. The presence of embedded URLs and the nature of the heuristics point towards an attempt to exploit users through deceptive content, such as a fake strategy guide, to compromise their systems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/tigilomesakug.pdf In PDF document text
    • https://ph789.com/pinhsuan/files/file/levigapu.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082816d0a938---83532762057.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/72e0c94bded87af7aba1a0d80061e461/jerogiwidofujeduzumat.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/85365169498.pdfIn PDF document text
    • https://sonarmusic.hu/up_image/file/medaxujojasogalidibisonok.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/fuxapavope.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b513c964e06---jajunalozijutesoroz.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/jeximaka.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/wokuluwulipifujoxa.pdfIn PDF document text
    • http://bookblog.kr/data/file//files/zozuzedaxamatupituxege.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d46da36d1b8---67502122699.pdfPDF link annotation
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9d2357ecc---27371242464.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/d0e99ff5e2b61f8d60a52d8793da4077/23754810683.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee5fd8e1581---zejop.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/50547034648.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/xerebiti.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/jibekerotijib.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/62468653c43737e78f8a74c7825ee7bf/dawakezukudakemupez.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d0f22d2da---suzulubamudubeneti.pdfIn PDF document text
    • http://yuli-china.ru/d/files/6109197728.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/99478549359.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/jenaku.pdfIn PDF document text
    • http://precisionsurgicalworks.com/alpha/ckfinder/userfiles/files/61586913018.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87b07e73c9---30610614103.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=pokemon+sword+shield+strategy+guide+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_off0000f637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF637 18492 bytes
SHA-256: 789ac1dd08b612229c4fa2dee5f1197ee2dbb6b319c0aa9ebab340932b1d772c
font_01_sfnt_off0001265a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E71 11340 bytes
SHA-256: e2c16e884896ebfc0d30c78da1b2af645742c08977537267659d86993817d634

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