Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7a6ffd77266913…

MALICIOUS

PDF

92.0 KB Created: 2021-07-07 02:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dff9aa4620666a8d80e6cd541f8f27bf SHA-1: a2bb464d13215a1c9cf78c1960d00d0aab075430 SHA-256: 2f7a6ffd772669135b0818cf8f92f66de7e0d8e3df7faaa0e67eb0b33c70d55c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple distinct hosts, many of which appear to be compromised WordPress installations. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/39960be1fda96bbb267f01990e51a862/boxolirotularuzexegaf.pdf
    • https://zahnersatz.pl/userfiles/files/kuvimipomulenaduj.pdf
    • http://heyumpnd.com/userfiles/file///77903999844.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070a2159a894---70426975819.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/ms3lj7i9vgajrqi353ejs6u031/vegugafoge.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080670501e8e---18337290709.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/20aee774e3eeda1769fe4332a185df9c/jewonijedejige.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e10d6164d7---96170008808.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/33407ab97a0d037bf867c08e63b0bbd3/88262318702.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3a5ac14df---94556177928.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/311664c6e970dd82fceeda309a70d514/62199490376.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/bpvpsh8m6fohqrckqu4hpm0mfm/99094219963.pdf
    • http://thevelascofamily.com/clients/11614/File/11200427371.pdf
    • http://emannsltd.com/userfiles/81110581451.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608933dd9b501---69914178762.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b93c1c3ef8---fegokonuro.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/02c46104449faab8eff69fcd88dc2e77/96678510119.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16087b05e59523---wezeradid.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/1946f890e3036d49112bf71f49a5c238/detirogamonej.pdf
    • http://filtrydokoparek.pl/img/all/41176918693.pdf
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b42f1ed0396---33800383303.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779b6da6f94---rotarubitupez.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=21st+century+quiz+questions+and+answers+uk
    • 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_off0000fd48.bin
11512c364fac597d74f3eda48e6811f173e80bfcd651d1500dd444c4e375197a
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD48 19736 bytes
font_01_sfnt_off00012f47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F47 16792 bytes
font_02_sfnt_off0001475e.bin
24baa76fe576264b68af46e1883bc54ee1fa9df5a79807200de1f8d96b6b281e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1475E 10992 bytes