Malicious PDF — malware analysis report

Static analysis result for SHA-256 c652e474ff3f0012…

MALICIOUS

PDF

86.4 KB Created: 2021-09-13 12:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: eaf7b537938cf971d29aa20bb7f5c433 SHA-1: 704cd20bfcdb40a8af1eaa84a3ce9686026a7206 SHA-256: c652e474ff3f0012e2697c811e9e79109271e10d5e4279917970641e39f54437
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, directing users to various domains, some of which are hosted on compromised WordPress sites or use disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://catamma.ru/uplcv?utm_term=powerpoint+maker+android PDF link annotation
    • http://ip-golubev.ru/ckfinder/userfiles/files/42379515408.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/xinevas.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/savegudepopubusomawazu.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/pojowamapufilapiv.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1613b51cb10e1f---basilutivurugawupu.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210906075554.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/wuririxerikitomiweteme.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/93867652659.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f07f3a3459---ledumasub.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/55251876558.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/wubidotumuv.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/34668888544.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/ckfinder/userfiles/files/vodurumemetitopometiguwe.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/90511353067.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/dorimomesu.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/82992044104.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/xuwuzakimisiporuri.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc874ee9de---72239216840.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/pijetexolelikemodisa.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/77776997798.pdfIn PDF document text
    • https://terracell.info/images/file/70179508443.pdfIn PDF document text
    • http://eko-uklid.com/files/file/kenuralemipozivam.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD614 17952 bytes
SHA-256: 70ceaf2a185a39b1af4c287b881e6337dba3367148c39aee566731cb90f63a58
font_01_sfnt_off00010437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 10516 bytes
SHA-256: 54dacf86cac606331bdd1b607db5bf850b71aa8ef6485f222db715208a8c3d42
font_02_sfnt_off00011c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001343f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1343F 16632 bytes
SHA-256: e896d0c9c6509c93731645541c0836c845742b74f7fde2e8ff5e94baacc6a6a0

Open this report in the interactive analyzer, or submit your own file for analysis.