Malicious PDF — malware analysis report

Static analysis result for SHA-256 f028ce2a58f9f572…

MALICIOUS

PDF

97.7 KB Created: 2021-07-02 05:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67ff08806dd2f9897a175e8b7630826d SHA-1: 03405554e749524d6396ab7de13a669bfbe58f44 SHA-256: f028ce2a58f9f5721717ba24c644a48b35beb8d09597fb22fe66d934b492c2fe
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous URLs pointing to external resources, some of which are hosted on compromised CMS upload directories. This suggests an attempt to lure users to potentially malicious sites or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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://amphorabeautyclub.com/campannas/file/weruvaxi.pdf
    • https://bawwabatrizq.com/userfiles/file/26609705377.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/852b7b4a5f9b290ff7f9f87c86b72f6e/34033808199.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca003a061b---patufikaxe.pdf
    • http://locthanhwindow.com/img_duhoc/files/govomoxejuzefit.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/8cagqfm8hkb76v9j6j7cbgjeos/35583596455.pdf
    • https://avenue102.com/uploads/file/romenodose.pdf
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/fbdcb72965c2ab29288c4ea97fb2dd35/96186166586.pdf
    • http://envigest.cz/upload/file/69701743660.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/fasegoxufegilotulezakuka.pdf
    • http://thunderstar.cn/userfiles/file/20210614214410175770466.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea3d13dc95---zadebipalanugatopusuwujus.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160984607e6cdd---15874592172.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfcfee566f---sezenumojaziwomopuzunu.pdf
    • http://whalesart.com/uploadfile/file///2021062019263118.pdf
    • https://kraftyz.in/ckfinder/userfiles/files/764025895.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/nojulurixutenomakev.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba98e8c5ab0---63476096805.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/2d8abkuooqilnnh72vnn6kg4gd/94889345167.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba61f6af09---96802475980.pdf
    • http://safeabortionnepal.com/userfiles/file/71985413159.pdf
    • http://geometrarontani.it/userfiles/files/noxijiwiwipusu.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160933cad11c8c---33744713432.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c18233cecb4---fuwarazorog.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=9th+class+science+experiments+book
    • 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_off00011ab7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB7 16792 bytes
font_01_sfnt_off000132c9.bin
a8e383d91bbccded575346a7be4507c09cad18b7f8cecdb2f8bf8cb5b70af5d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C9 17400 bytes
font_02_sfnt_off00016033.bin
7b9deb5874ea9c85d15697c7ffdc665a156710ffd455c226dadc5c291c09089a
pdf-font-stream PDF embedded font (sfnt) at offset 0x16033 11044 bytes