Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ae85673817c0b6…

MALICIOUS

PDF

97.5 KB Created: 2021-09-06 11:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 58a65cdba71229304ecf6be89d997870 SHA-1: bf9963dfb0a1094c49d572ba5fd12eaf8ad4ae42 SHA-256: 47ae85673817c0b65867c4492ecf291ee2a676c850521a2094924c544d03362e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The presence of numerous links on disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://agiusfuneraldirectors.com/files/file/filokimipiwodiwaxog.pdf In PDF document text
    • http://szentistvanpatika.hu/upload/file/21858040209.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/vapuporotaliwut.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/didugozojimuwudolug.pdfIn PDF document text
    • https://avenue102.com/uploads/file/paxegozumos.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118a9a1dd0ec---27824403340.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/72636080044.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5e7de3f4e---risakim.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/vabofewepubawewumug.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/87910142962.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a96925ee8d6---nokigojukewani.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f69618a0416---62429430861.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084070dacb7a---2234258746.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161307bc54ba7d---nitamilemifox.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/lepap.pdfIn PDF document text
    • http://tscyw.net/userfiles/file/20210823105718_esurot.pdfIn PDF document text
    • https://edarky.net/data/file/32804235869.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/60845863292.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be40388993---gagukobopuxetasezaxanafez.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/20185102673.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/86637969744.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/51055292498.pdfIn PDF document text
    • http://cjatkinson.com/userimages/3367627470.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=enervent+pingvin+xl+manualPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11503 10560 bytes
SHA-256: f8be6f292441ca14b03f57267c1333982ac7e5cf14c066f17affbafb41154abe
font_01_sfnt_off00012d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0C 19520 bytes
SHA-256: b13d797bf688ab4bd8b092925479126b926e436fc07639a8bd26e1931abe2723
font_02_sfnt_off00016072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1