Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabdb3a207195894…

MALICIOUS

PDF

74.0 KB Created: 2021-09-27 20:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 942203df869db80d147e206faa5f9d2d SHA-1: a1367b913f0405b88467258fde334e1139ec3940 SHA-256: aabdb3a207195894acf3277a97bd690edb61858117545ebce70c8dd19c9e8a6f
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised WordPress uploads and other disposable hosting sites. The embedded URLs, such as 'https://garglob.ru/uplcv?utm_term=the+life+of+pi+full+movie+online', are likely used to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://garglob.ru/uplcv?utm_term=the+life+of+pi+full+movie+online
    • https://copacndg.com/images/uploads/files/zubapojenepexuxutu.pdf
    • http://travellightnepal.com/userfiles/file/64190722209.pdf
    • http://mediacast.vn/ckeditor/upload/files/jisuzufoturuko.pdf
    • http://centrlita.ru/archive/image/file/wutepezinirebajekigovefig.pdf
    • http://farmaciafici.com/userfiles/files/kibupisog.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/vunofojomid.pdf
    • http://lauraestetica.com/userfiles/files/ruxoxasixiwarulovum.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1614dbe2be155d---selubidu.pdf
    • https://locktactyuma.com/ckfinder/userfiles/files/13476075214.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/fe1b9ad20c91a85968f88ff834c34ea9/lawud.pdf
    • https://inprovituruguay.com/ckfinder/userfiles/files/wofuvutaludifigon.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/e61sg7mqo561qsq6s5ohu5l1pd/78411944439.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/07ja82j0uurk28ouj6b6jufsr3/xesuziwedu.pdf
    • https://samavetpharm.com/userfiles/files/redanejelenuwojumibom.pdf
    • http://hkacca.com/userfiles/38022073554.pdf
    • http://dges.in/userfiles/file/zinotudigo.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161325a5833413---83577507300.pdf
    • http://hani-bee.com/userfiles/files/doxegerezofere.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613791e391c61---xidetuxafanaler.pdf
    • http://bippex.com/filespath/files/20210905235641.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16144f60d8d70b---ritaloxifadamimaleg.pdf
    • 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_off0000bbab.bin
11e244ec4c3ec529665a689ae4ef9a5fddd20936f77cbc0690d19b126d5107ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAB 18404 bytes
font_01_sfnt_off0000eba7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA7 16792 bytes
font_02_sfnt_off000103be.bin
dccf2abeac6bf0c1b60c75701a92d40af3c085d9326144cb3e43791f656a0bb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 10224 bytes