Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a416591703aba01…

MALICIOUS

PDF

86.4 KB Created: 2021-06-30 14:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 873b5308e45aaa59aaac2fd7ce13a388 SHA-1: 08a515ad00a3ac3857c89a406d4ab5b2b609cc2e SHA-256: 3a416591703aba01bf9f6d5b51a72d1a300c2da65d210c6db8544658a6762ac3
156 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://krisoc.ru/uplcv?utm_term=how+to+draw+a+spirit+bear
    • http://sgyscom.com/upload_fck/file/2021-6-21/20210621124205427420.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91505e6b73---9390682999.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ea3812e3c---ruzifev.pdf
    • http://thevelascofamily.com/clients/11614/File/sevewidazevivulodorid.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/34ub3qmbl7o9jjguprmkhb5t64/21961610883.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/a722cf7e974cee3db0fe532089e163e2/xamevebeme.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/483cd286bbab8e7d32c5487491c527fc/tesafiwenabukafulixenagek.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098adf30790f---86710324579.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69703d8bfa---dufisidusavitagujomete.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873f6a1903a---92151329994.pdf
    • http://dzbnf.com/upload/file///60962005758.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9edbb04019---ruvulonifi.pdf
    • http://midel.me/userfiles/file/joxumesegagolukefej.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/669eec00b8cf473e32bda0795594f5ce/tupekokalimegiwat.pdf
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094a216bef61---jumasemipexalo.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/98e4c4932892715ee49127935fd86ff2/34139338510.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/0597dc75ee116412186c03921131baa2/15175716814.pdf
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/lodawu.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160965d7b2c10e---dekuj.pdf
    • http://reikihaus.com/clients/75291/File/84637192770.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/1c04c417b8bae9fa0af1dd3abc2b9cef/dunoseranudi.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075596ea005a---74395844625.pdf
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/e5556ab1bfee9f0fb9ca38cbff4ae9d6/18796469931.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa5bed7abe---74316871780.pdf
    • https://cakenepal.com/userfiles/file/minadumadefokajorawitu.pdf
    • 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_off0000ed89.bin
c62086b6efc49484ec8a574ca9fa453bf5be94d6870e423fc93794340cb05343		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 10452 bytes
font_01_sfnt_off0001052a.bin
ad0e0a5bef519d11c0071a28d993e34fbc00557789b57435a476db74250e5063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1052A 17764 bytes
font_02_sfnt_off0001340d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1340D 16792 bytes

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