Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aed00c2ce2fb426…

MALICIOUS

PDF

78.1 KB Created: 2021-06-14 09:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 15249e9e929580cbd40a4c36afbf4db3 SHA-1: c5507765318fd331aad4cfde0296614a05b3a01a SHA-256: 1aed00c2ce2fb426edbf6a53a302a03fd080a10293d0b2547010ce4936003c09
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, many pointing to compromised or disposable hosting sites, disguised with a lure of "Maslow hierarchy of needs essay pdf". The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://queure.ru/uplcv?utm_term=maslow+hierarchy+of+needs+essay+pdf PDF link annotation
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723ce49a595---bisivoniduparedo.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/20f4dea6bd96251447b01fbb2f2fd3b2/59460683591.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088280a27f13---56146079566.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202106130319315452.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/zawinuji.pdfIn PDF document text
    • https://unosms.us/userfiles/file/98935793766.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/92630744208.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c13d999f627---pivawaxoleg.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/4279798748.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/ramagofubowenogerekidat.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836314ba036---10150981910.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/0o4o706hlnfj2mn6rbk6j3dbgh/81878438219.pdfIn PDF document text
    • http://thevelascofamily.com/clients/11614/File/xazarozuvagopikoworusupi.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608536c442450---bibodubajutesuroxisafabub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30B 5440 bytes
SHA-256: 80ebe5113742d24bf8f00b66a1f9f406137c048e3a0046ba2fad9e15eb50208f
font_01_sfnt_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 10936 bytes
SHA-256: e856ae932bf0e235368b0f8ab3fedc01a0d4b54de65c26deba46a997a2de5bbb

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