Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e747b611449d3ad…

MALICIOUS

PDF

88.5 KB Created: 2021-07-05 20:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a7e7c831847f9829e2faf75cfae42690 SHA-1: cc349462345e03474eacfe9e8b189eed25578a5c SHA-256: 3e747b611449d3add7a994907595aa95f991c095995134803870b0e284455566
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress installations and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • 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
  • 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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/d0an57s1jmhid57ibnp62d0hv2/65552727158.pdf In PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/0bfcbb92a6cf2cec65ca6ddb0ca295c1/83595074705.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/mavodadiwuxezefipafofe.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/gufuruserenosor.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acee692f068---tumixewisixekunakilawu.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897b1575899---jizekuxuwakegexitibe.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/69835555110.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/wozajatixedalumedivizasaj.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/95d1ed74e9969217d683bcdf53acb6d7/41160802640.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d71938de3c---3813242971.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/a3460cbe787920254efb93b331e812df/botala.pdfIn PDF document text
    • http://yuhongzg.com/d/files/fumovanofuko.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/5910336438.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/11162357583.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/damete.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/53441415127.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/2ce77c12065a25582d3cef179adb5097/zidinujesivigis.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f836cb735b---kejesukel.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/50ac6e97726ee7ab3af279aae285c9c9/vesili.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083283430670---xadodapopofelufa.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/89199824894.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/tevewunobugefas.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/voxibipadisoj.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/73752827670.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/7c97eedbe67cca0fe61039a618dabe13/jusuzelebifodezozu.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf9ac3910f---gefisop.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c04e06967---pexagodexibujasiwozigod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=ktouch+for+windowsPDF 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_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11180 10408 bytes
SHA-256: b73e63a06812d4ad6b66bd66bbea08793ecc678ac2cc53f97cf172c185303bfa
font_02_sfnt_off00012911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12911 16772 bytes
SHA-256: 43bff766ff41b2d53fe3b839bd1e349c85a8078af134867bbf96b2c6b5de91e2