Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddff0b060017ed2d…

MALICIOUS

PDF

75.3 KB Created: 2021-09-01 08:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3de13b689133b9f5116fe4db7495edc6 SHA-1: 0709f62916351ed802eff212bbd6f84abb79deff SHA-256: ddff0b060017ed2d14eb7b60d3c44df9d9eb016e41ec2cf02e2cdf676e28eb39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, indicating a link farm likely used to distribute malicious content or host phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16096825380ebc---foradubudunivujilunaned.pdf In PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/79b07db201ea04c83f77c5afbcd2bbbf/voletapenonojela.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051503282387.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/xowodurarabi.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/kebigisixobinuropilaj.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/f2f84a83fa31bea5c851527d0268dc21/jadenezaw.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/a2bf4fdd2aab852da34ce687b9f54b61/41260729407.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/2e482506c990fb3090cb1aad4dcea754/65281429769.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c273e540f8---89060328468.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/nazimog.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606da19f00cae---75994691156.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a8f1d6d25---37931990167.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/18406143987.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1610cbdb394090---12063599448.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/03b785fce3bc332180ad86b8809a05cc/95924121240.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/b2da65f1d7bf91463d88683328a4b558/73825110238.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/47acc0cc89e0b4a9ba5299c275be4e9f/jilivobipadofikowux.pdfIn PDF document text
    • https://apartmani-mestrovic-krk.hr/files/tipuzobefixujutagux.pdfIn PDF document text
    • https://btegypt.com/file/51420583836.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/jutukewuwakobevekovedemuk.pdfIn PDF document text
    • http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/jipenog.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/64993089823.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/55496839626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=technical+feasibility+assessmentPDF 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_off0000c7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E4 15748 bytes
SHA-256: e228386a7b20c1bf2c10fbd9d10700419e3f0f70f302f67d79f2b777be1d348b
font_01_sfnt_off0000efe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 10600 bytes
SHA-256: c9599c4f56c713a64867dc3c35aee44d1b79827160e07d0a34f05bf7e17385ba

Open this report in the interactive analyzer, or submit your own file for analysis.