Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ba154072bb64a5…

MALICIOUS

PDF

89.6 KB Created: 2021-06-29 06:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea1025b573e516d45ee30728bc14e9e0 SHA-1: abd3453656a6ea952ffcaf3e5098831c680f9018 SHA-256: f2ba154072bb64a5f8bfa1016324853cb6795d015a8e86117e9978096f52f9bf
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely intended to lure users into clicking them, potentially leading to further malicious content or exploits. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or link-farming attack.

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 http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078aa9bccce0---nusamasovixoxine.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608201da9dd71---99810254645.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/a882c72b777302e6b92a2756a38ed44e/mibepajewabi.pdf
    • http://phantasos.org/userfiles/file/pemeganagokezepimepaxo.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/397b5ou7fpm5essk63nh14c250/paxunosisakijitovizi.pdf
    • https://angelsstaff.com/uploads/file/95738482966.pdf
    • http://esejsc.com/upload/files/68469682150.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/e41c16dea00bdfd20ae5a2c901539eac/fipidowigi.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/0e321979f09add8ea49f972e2f64bca7/97196661214.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ggm2qutrh0mjcu7orfmrmpffi0/vetivibupepemebukosaza.pdf
    • http://dush-kz.ru/uploads/fck/file/55240507899.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/afbcd7c10c66bdafb7e8f34b32bc335a/85745637330.pdf
    • http://magooferta.pl/uploads/fck/file/roxaxevuf.pdf
    • http://akkoryazilim.com/userfiles/file/77782368093.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/400dd21378a80ff40e25d9b5f20a5979/99226667354.pdf
    • http://aircond.md/upload_fck/file/71897445246.pdf
    • https://arhometutor.com/userfiles/file/79687713298.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cf59a870a37---51565271944.pdf
    • https://faresaldabbous.com/uploads/files/wawibepojilem.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16088571cd6015---61743712880.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/5e1aa09f0f0f918442fc7f10d248f93c/57261390259.pdf
    • http://dgjinhak.kr/DATA/upload/files/202105270928548369.pdf
    • http://ownlines.com/upfiles/file/40160440704.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=800+kwh+per+month
    • 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_off0000fb12.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB12 16792 bytes
font_01_sfnt_off00011329.bin
e9659683ef9372ae0a55d07cd61ad18318fe0a0908e810fcb2b403e983148024
pdf-font-stream PDF embedded font (sfnt) at offset 0x11329 10460 bytes
font_02_sfnt_off00012abf.bin
b33081a674a9866d9de4339c52a6cbd7025d7b28aa96428263930aa750def0b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABF 17832 bytes