Malicious PDF — malware analysis report

Static analysis result for SHA-256 30f866445fdeed1e…

MALICIOUS

PDF

90.1 KB Created: 2021-08-02 11:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8e959b8049290f1ccaa4272b758bc48c SHA-1: da25318376f27c8486be8adf9512b600ba342ce8 SHA-256: 30f866445fdeed1e4e556c22f02458a4446030d42301f8c224259ce1ce5765a5
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as a lure to redirect users to malicious or phishing content, potentially exploiting vulnerabilities in the user's browser or applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/a5lt1p0327711i9rokon71q7bg/34579963096.pdf In PDF document text
    • http://se-ty.ru/uploads/userfiles/file/62943227832.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/oqacmrkg0d957t9an683pacuo4/tenupu.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/57376397299.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/f470fd2a308c06cfb57fbd55aeb909fc/xewedir.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/rizaxagawajamumujajok.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607872e34b756---xubegivin.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/8oj9do9fgtocrh2sr4bq7083bo/59724800616.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/be0abdbb6d8c0d00e53157f50cc1152e/waxiladetuvebamikufofuw.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d2269f598---lefaxizonasukuzulozur.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/32313316098.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/nunidukojuxapagixadubusud.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/30292406849.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/68837829692.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/0c0e2b5a16e174282db97e59c7a77a02/wuwavisatadajatikopaxeset.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1bc719f85---kutaposinem.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/9174727074.pdfIn PDF document text
    • https://bayihoki99.com/contents//files/zupedufelexokuxaviru.pdfIn PDF document text
    • http://esejsc.com/upload/files/19591564329.pdfIn PDF document text
    • http://ubest.ru/images/file/fugomewapetefaneme.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/c6052f35b5a6180688d278d04b5bb7a5/zemepa.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c750580e9---vodagopalogot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=bol+bachchan+full+movie+download+hd+1080pPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 11348 bytes
SHA-256: bb633701f06583075020ef3d962fd469381371a051381e8af6fd894e3ce6d0a8
font_01_sfnt_off0000fa6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6E 18524 bytes
SHA-256: 01a6a989501a6d825a95d97819e46de3c50a5cdb51688a171279198e349604d1
font_02_sfnt_off00012b75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00014386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14386 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825

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