Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cd643602fede06…

MALICIOUS

PDF

108.1 KB Created: 2021-07-01 12:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 40fe01f53f8de935ad6fff9c3f8ef7cb SHA-1: 151699d571ede74d63eb20508432ba6a4d5c8cae SHA-256: a9cd643602fede069b4323f35825510eb90a5add6133f11269b486434b5b93f8
204 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or malware distribution attempt. The heuristics indicate the document instructs users to disable security software, a common tactic to facilitate further compromise. It also contains numerous links to external websites, some hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content or download payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=need+for+speed+underground+2+iso+download PDF link annotation
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19616624776.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/rimoxelefuwesoganinage.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/linodutuzozutixifegax.pdfIn PDF document text
    • http://ruresept.ru/files/file/fufufabumisusarimogube.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/tpvcvejoddr1ubcfr2hku04rfb/naduf.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/20368707714.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/47bf8af2c98c1c0d73619f636969d629/11633260444.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/7803042027.pdfIn PDF document text
    • http://delvalle68.com/clients/54584/File/73923412603.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f6e4ec59a---vuvixawuwatepubixijirafuf.pdfIn PDF document text
    • http://pi-consulting.ch/download/bumoliju.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/wuwijemipifoji.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc9ed27afb6---79187428820.pdfIn PDF document text
    • http://nhaphangmy.us/upload/files/24428167532.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/nowetararugiletoki.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086fa0c8281a---gefixazojaxibivefoden.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b14882ccad6---gukonuvupafoju.pdfIn PDF document text
    • http://asfalon.com/__files/file/35337186342.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/6476635558.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/75344184864.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/golubenaxezivewuwanulir.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/xupige.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/41469386935.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160aae9a155a28---57494037591.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001341b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341B 2972 bytes
SHA-256: cc3df57f80808358ec12eea98f57041b67e86d1852e0bf825fd18925e69a79d8
font_01_sfnt_off00014033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14033 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15845 19100 bytes
SHA-256: 3f0d4fbb8b3668b3263e78dd6b6975f8e4bc3a12557c7f38c7a5f18d731583a6
font_03_sfnt_off000188ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x188EF 10860 bytes
SHA-256: 916070dd5b496680693aa78c88ae3ba72f8601887f344ac18392bbc3665b579f

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