Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daae8e7033284b4…

MALICIOUS

PDF

82.2 KB Created: 2021-06-29 03:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e844067835dc63f5537e8b2fc38654f1 SHA-1: e866f53b06e061f92143d70031072ec12ffb4355 SHA-256: 6daae8e7033284b415022a0cee9a846af76619b7cc0c65e664f97f0ce4e5f508
156 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links point towards an attempt to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://bancodevida.com/bancodevida/admin/images/image/file/30428813888.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16070e823ce698---97458030481.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/33598cc8f4707a01c4af6047405a5d45/sadebiruvetakasifo.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/429nledt8s3bvjvh398tl170kk/60240798202.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ba40b66cdb3---49771750400.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8208a3cf3d---mexirapixivowo.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9614cc9fc2---jirirudojaxo.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36c886e681---lopemijipopitejumutulu.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/83fe630685c5f851b68a68e04e1f37e7/38718850324.pdf
    • http://bajajsports.com/userfiles/file/83877959457.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a145f6f23e788c98d1e6731ba62d5c2/23383703500.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/xujud.pdf
    • http://kulturazebrak.cz/userfiles/31938018558.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/58c7686dea3a2625a66e283e1d9a73a5/jemidelirir.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf04c9ec80---pofaxetekanogo.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4b8b49ad9---40473010793.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9d1f6dd80---38435773853.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160769740f41c7---fufemadesum.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/v52asegmikhc18l7tkfgbn27q8/tizerop.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76f2b9c186---61041079879.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c083077c5ce---39209617316.pdf
    • https://betentour.com/sites/default/files/file/79707003787.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca0c03f227---konoluvin.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d48519148d39d4c424fd5f0d24155bc9/91145687775.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071cae3a918a---11963773100.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=i+love+one+direction+movie
    • 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_off0000dd8b.bin
c7c421fdce548113d4bd060f1c93434ef7d17dd1094be2eea8d4fb81638865e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8B 17996 bytes
font_01_sfnt_off00010c71.bin
2920928d7997308fdc60e901698c00d25841832155290251e644c16709ad769d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C71 10220 bytes
font_02_sfnt_off0001234d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 16792 bytes