Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cf3a1802a1cf33…

MALICIOUS

PDF

80.4 KB Created: 2021-06-27 23:11:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f69e9aa42fbe7ee7e2ee481c0af5760f SHA-1: 52a525d213a509af5c19fc4a929ecd8d110431fd SHA-256: f7cf3a1802a1cf33290b41191cac5ede797af8e95089a1eee3695c23fadd74bb
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://camionespanamericana.com/userfiles/file/letetu.pdf
    • http://sarljarry.fr/userfiles/file/28978986812.pdf
    • http://www.aadhar-interior.com/userfiles/file/vetazaxuzuradasarokopi.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608968a95fd4b---netofowufozipigezo.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608caa3785d58---gubixikoderadeselevusu.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/odbl1u8ehvuvsmedcsn1lm56s7/xowij.pdf
    • https://lawyerupsmart.com/tempimg/file/biwesoronagedekadevibe.pdf
    • https://bangprice.combangprice.com/beta/cms_image/file/97516755103.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088d34f5096a---pubiwapu.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/5eadb8881d58555ceff035a91671e62b/4037864238.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a69e32ca41---ridopifavexomizulepiz.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e490d02dd---tobodawe.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/3d110b1704c7599aedc3b73ceb8dbd94/zedetewixagefu.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/hlj9bu2knmhnhg26mtug97hu6g/powarovibi.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836676e5cb3---munatuj.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/4a249f7385be7d562c6aac85c61c8c8b/paxugoroniruxurabu.pdf
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/c5e8afa2d30ea00acb975902ab3665db/dosazukesalof.pdf
    • https://hgb.se/filer/file/34384560124.pdf
    • https://baoholaodong24.com/userfiles/file/69221960687.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4da63108---79969329188.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/8i16p434succ8i47t8impv6o09/10337405997.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/97df32237b02838fa8c76fa4f231c379/71559716409.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=meowing+at+cats
    • 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_off0000da30.bin
a53954180f301cdacd7f021685638510a9289a26aab6b4b58cca8e55f6f8c5de
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA30 16480 bytes
font_01_sfnt_off00010513.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10513 16792 bytes
font_02_sfnt_off00011d2a.bin
d065cc67b89f3111f68c57a7aced676581c347750d9258f1658406ee0ab16c38
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2A 10336 bytes