Malicious PDF — malware analysis report

Static analysis result for SHA-256 c68f246a0501782f…

MALICIOUS

PDF

83.4 KB Created: 2021-07-06 14:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 119946bf94dc3b398a3b41741ebc167f SHA-1: fd135c084a2ea66c57fa8d988e1c0a79cc330877 SHA-256: c68f246a0501782f5b7ce234987f6c416e5b146778c47b8d314c724c89581ff2
156 Risk Score

Malware Insights

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

The sample was identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV, flagging it as a phishing trojan. The PDF contains numerous links pointing to potentially compromised websites and disposable hosting, characteristic of a link farm designed to redirect users to malicious content. No scripts were extracted, but the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/numewazedobibizomof.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/prgjcop33rk0ssk6n9qoofse01/rokenujinon.pdf
    • https://aldurra.ly/images-editeur/img/file/65095138858.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cab28c4ca85---72918957125.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/7915e20e92d1bee278e981abe7af951e/47961690898.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093b879bfbce---54056266322.pdf
    • http://agataklimowska.pl/userfiles/file/nifunixuwatefepejanaguge.pdf
    • http://wmhsclassof1977.com/clients/34196/File/4897469373.pdf
    • http://decom.pro/admin/ckfinder/userfiles/files/37265542876.pdf
    • http://videofilm-tv.ru/content/File/zonibaf.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3efb97c535---98063943697.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/k00e6emrm7am3idp52i254gn52/1056623200.pdf
    • http://koszyczarek.pl/userfiles/file/36978073790.pdf
    • http://amandatravel.com/userfiles/file/mafuzekedotipenil.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/15641157760.pdf
    • http://fred-robin.com/ckfinder/userfiles/files/liwalobudapibave.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff6bb5377f---58782659833.pdf
    • https://atlastoursntravels.com/userfiles/file/93591608393.pdf
    • https://htddienstverlening.nl/userfiles/file/92025356321.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/dc17d16aa2bdfa869bcb76ccaed9c5f8/88557235954.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/pmskkdtoss4ufc7mt5rhdstcq7/kufejavonikibupoxevipilez.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608201951610e---pilesaxozam.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098747d3f06d---8574484062.pdf
    • https://tenfci.org/userfiles/file/24512859434.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+does+pm+am+stand+for
    • 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_off0000e222.bin
5e9736b494659371480149ce78e3093bb1fe22cf463c61723e4df51a4fbfc5a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xE222 17080 bytes
font_01_sfnt_off00010ea1.bin
a356671ac7935bb1da810095bcb8763a2313ee7c40633a1064de0ba49926c77b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 10616 bytes
font_02_sfnt_off000126b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x126B9 16792 bytes