Malicious PDF — malware analysis report

Static analysis result for SHA-256 e13326f06ca490f1…

MALICIOUS

PDF

87.1 KB Created: 2021-06-29 07:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 0c99b8cb7195b4119e4c9f4d5e70a14d SHA-1: 1430e75ffb2b7525cd88c69f26cb2fe789d69ced SHA-256: e13326f06ca490f19ebe3e97885f541066436dac574dad6aa5a2e3fd04e05c10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the PDF structure suggest it's intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://huntic.ru/uplcv?utm_term=cell+power+level PDF link annotation
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/d213a31797a96e1d3591f1746cbc4c80/49449068630.pdfIn PDF document text
    • http://gwtcs.org/Content/uploads/files/mogokezusamufimabesised.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/zugipinironofumud.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607748e36ee7f---genotutobogejalaj.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/14614960010.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/95872772511.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/9s2rfprv95of963aae0o4qglf7/47900158773.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/19720623848.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbe4c52798---38878268153.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a8ddb3578e5ba4db017cd5f2cc1813f5/95175354496.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/gji0geolsff1jaabp61mh8l1e7/75211513069.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/lopilixemaxutom.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/rorel.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/17083186377.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/c1fd222ee2850d798764d1caeaaf8759/muxuxoko.pdfIn PDF document text
    • http://apvn.info/userfiles/file/38664235402.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/24538303680.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089da293caa5---wirobozabalafaraf.pdfIn PDF document text
    • http://afslab.asia/upload/files/47997887493.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/8307bed2c652dcc2c5e24430ffb05a2a/fametajovuzifedoruteviv.pdfIn PDF document text
    • https://fallsplat.se/file/30791081368.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd75e3575c---14418195326.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d233feb836f---tanozefavanufojefewav.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a06aab449---45073352091.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8433942e5e---benegirilizuf.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2fbe06d05---32404232817.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ea74a0fef---nunapulir.pdfIn PDF document text
    • 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_off0000f304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1A 9804 bytes
SHA-256: ba2b2c2979377008ba123ab44350a3a7241e5b5ec52569349a06664dcdc2b3e6
font_02_sfnt_off000120c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C3 17664 bytes
SHA-256: 0109d24069b646d6506072b4f57d74221b1f6febd1693e6f962a90d18c9f37a6

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