Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2d83f12c08db9e…

MALICIOUS

PDF

99.9 KB Created: 2021-08-02 01:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: fb438b4c30ae811e661697291036a217 SHA-1: 4b74372d95ad43b195bc9944bafba760397435df SHA-256: dd2d83f12c08db9ec59ddf06865df700f58bc968fc0f37e046c0fa4e6a7f7a88
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external URLs, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were extracted, the structure suggests it's designed to lure users to malicious sites, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5302

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://noithatnhapkhaugiasi.com/luutru/files/bijapufagiwal.pdf In PDF document text
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/zabexigusitije.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/3298935488.pdfIn PDF document text
    • http://woorymart.com/userData/board/file/wekenixi.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/5676bb4eb6467e045b7e807dc28cafa3/96414116685.pdfIn PDF document text
    • http://tw-sincere.com/upfiles/editor/files/zoreroxetinalipik.pdfIn PDF document text
    • http://plncse.hu/php_data/file/35774393408.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/6f803945ba65c1b9a6a119e60f04b24b/runitezugegeminijepisosil.pdfIn PDF document text
    • http://trickorsuite.com/clients/5/5d/5d84d12f6f4dfd10bbe5497c884a5f3e/File/36195270639.pdfIn PDF document text
    • http://timapools.com/uploads/files/55436039599.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/pufidoguzugafew.pdfIn PDF document text
    • https://fratellifurloni.it/file/68418174370.pdfIn PDF document text
    • http://shinex-auto.com/userfiles/file/votikevisu.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/telesimozogobofaxob.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/12359100964.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/lnuvtqt6lc7jsls8sa3dfm39c5/mitinif.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/87810821396.pdfIn PDF document text
    • http://ahs1978hounds.com/clients/0/09/09313dc2b2b2138818c22350edca9cf7/File/91189393402.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/0f2d98fbc938a01f1edaf19a0957bc74/vifosubenewuwesixaxejozew.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/84597445336.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210522203200.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/30719813608.pdfIn PDF document text
    • http://baocaosudanang24h.com/uploads/image/files/94370148299.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/boketirimubij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=causas+de+la+rebeli%C3%B3n+de+t%C3%BApac+amaru+ii+pdfPDF link annotation
    • 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_off00013465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13465 18208 bytes
SHA-256: bcf90d5c0789cb87fa822d197220c2a6e698db8769f5ab44a79657d3ffb79f82
font_01_sfnt_off000162c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ADC 11188 bytes
SHA-256: b2894e760119386dcb8f46ea85f960d3500e7f019634d71af0acb6a64af8ded4

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