Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f82601c364cf2df…

MALICIOUS

PDF

75.2 KB Created: 2021-06-27 04:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3559355d4d671a334aaad5eb6c647a1c SHA-1: 20fea599e5940bbfff4824931133ab644d02105e SHA-256: 9f82601c364cf2df11e6ebfb092431ec19240629fa04dd4da77ca4defeae12ff
164 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to external sites, some of which are hosted on compromised CMS uploads or disposable domains. This pattern is commonly used for phishing or to redirect users to sites that host malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://files.ibiza-ferien.de/file/76237850498.pdf
    • https://cdmsig1.com/ckfinder/userfiles/files/zubekovakewawitufola.pdf
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ahgksbgaqvaja08ovsatv3r8g0/68782274472.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf662e69304---85744402963.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7be919e1e45780901cfefec60c075c97/61808321367.pdf
    • http://www.alfapilates.pl/upload/file/pejetezizutoresom.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086acffabc3e---kidurukixinusamigani.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16081acfaebeeb---vegeb.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/403918ad8d39ef97cb4f6958f9cac43a/37269812969.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/ivn33odc2dsrp7ddib7mdt5aii/joretizunuluk.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/bv4j37jou2eliqthqmk71l8ia4/91688089291.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/21cf2e821ba45e8eba09b42b96d63d92/10211263510.pdf
    • http://bong-dem-long.org/upload/editor/files/zevawilorepajesewaf.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/imk10isf00nv2mgf31l15uipeo/91713024001.pdf
    • http://alexlunacoach.com/img/editor/file/zovawaxefukukitixuxexu.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/a08c29201c67618dd56e911cee6c44e7/pawivuvosapepotafumozem.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/b6c00dd0276f80d129d8c9d1c1015f77/11654495846.pdf
    • http://chi-kara.net/userfiles/file/jagedilitagaradosaguxafo.pdf
    • http://tai-yang.tw/taiyang/upload/file/zedirukesowoxozapokokevop.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/rovpnpvrni5g6du5gpknd1ngg8/4149713383.pdf
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/51390687432.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/kikogikokelosumekugazex.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099b4b6eed39---15769544661.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094df196962c---zamobijovafozofagegimu.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/d6ef7cc7d9c1866da845718fcc9967da/9020621870.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=class+9+chemistry+s+chand
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2aa.bin
345b3fc7c87a42c0317f1e737f41efac042d990f042943f0a107cdea67bb41a4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AA 17036 bytes
font_01_sfnt_off0000eeb4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB4 16792 bytes
font_02_sfnt_off000106cb.bin
c394613928d2fe9865b214fbbb2511091b19df0baa0022ebcd2cdf77630a520d
pdf-font-stream PDF embedded font (sfnt) at offset 0x106CB 10828 bytes