Malicious PDF — malware analysis report

Static analysis result for SHA-256 65300fa5592c2091…

MALICIOUS

PDF

82.9 KB Created: 2021-08-13 13:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 00520aefd73ed665d71c638f8d8c2a4d SHA-1: 97ccb693eeb6255c58928f80c7abc74af5a100d5 SHA-256: 65300fa5592c2091bf001fb372d84ce9acf58d76cdd4031b9820fb5b85350cb3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript, though not directly executable in this context, indicates potential for further malicious actions if the user were to interact with it.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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 http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b27c20bd4---85355418040.pdf In PDF document text
    • http://nesthomes.in/userfiles/file/zeraxo.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/subati.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/38287406161.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/92132385796.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/84101747179.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6dd91c599a---zawubofajilodixer.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9216b297b---wupuvibomoroxuxi.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/83268410036.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f50a2aa92e---31924037923.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/193cea8112d6ca86504c206975d3cf54/5628342971.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/povasagobasosedixebonipog.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/b8b42431110a3dad5444e9e30adc72a0/difodedisazomemufeni.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/6a247ab7b435d7118779a6a05553dab8/fikuzazijoku.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20210724_3630C2E4EB122877.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/e851a0abc15329fe8fdd08ebaaad617c/79702443838.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115c62e84478---fiderelopolozen.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/72872996735.pdfIn PDF document text
    • https://scalping.ir/data/files/file/melitobum.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/73841554830.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/tovasobif.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/99744507046.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b90f01267b8---36200616475.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/dbcfc031710b8f92a46659a1bade7d99/vetakopumo.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/nagcv6ugjcaqonkr8vdjvb2h96/52287674212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=vin+boleya+sab+kich+janda+mp3+full+song+download+djpunjabPDF 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_off0000c6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000def0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF0 16356 bytes
SHA-256: 8aecc6f3375a688ed9e5a111fd8bb6636e1be959f9accb24e9ca4372c2652cd0
font_02_sfnt_off0000f55b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55B 15544 bytes
SHA-256: 95f2a75a4c26e2f165d763bcf38a40945a67ff6c4f64b55014f94f8738f5d37f
font_03_sfnt_off00011d86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D86 11672 bytes
SHA-256: 674accf9a7ce8f24486ad6dbf8bf1d3ea174e5ebe2dcac0a8fd16fdd6d8ce97f

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