Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e0a2d2f57f9fbf…

MALICIOUS

PDF

152.6 KB Created: 2021-06-12 05:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e86e942886680c6156d181ff70d7e3c5 SHA-1: bb21c41a4bddd66184ce1ee485f07206eac40547 SHA-256: e3e0a2d2f57f9fbfbd2349cd66d46c41fe28fcfc630f05db00c7231a410167df
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content or download further payloads. The document body, though partially corrupted, references academic theories, likely as a lure to disguise its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=similarities+between+maslow+and+herzberg+theory PDF link annotation
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c8648a0e426447072b6802212226b653/wulufuweninet.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/4dafbc8bf0697fb18e43fc343fb82916/pilujofidero.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077363304af6---dewabevilikusosebevomak.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/tofotasetojav.pdfIn PDF document text
    • http://stasta.com/userfiles/file/56678110641.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b54c1eb4fb---zafusekuvaxusaxozuza.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/ddd9549651c4232f83fe3194fc413283/sulewo.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/297ba7e351aad4fe23cfc0d704f5854c/16577075678.pdfIn PDF document text
    • https://prairieroseclothiers.com/FCKeditor/file/fenagufefumakobotixibaki.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b084fd30b60---32000024513.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091191fd0fec---faxalufewoboximuvufugema.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/5245098545.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/bdb5bcac8f822cc986f1e74de1da99cb/nanivekubi.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607449b0b395a---rixomezisawigatewuxafosa.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/6eed318bd9f560619f1507b79324d8de/60553686909.pdfIn PDF document text
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/injrl55rkkv3a1s76uk2tv7pcp/tigonoxinedarupu.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/lusogotago.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88a7d5d33---55683787210.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719963dbe0f---xiwikik.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b119b32c93f---49766197512.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_off000212e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x212E4 5728 bytes
SHA-256: 25224cd3c5f4e3d24e07f67c3b35680da9cf9d2f89190992f911112f379b50aa
font_01_sfnt_off0002264d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2264D 14752 bytes
SHA-256: 9b1170ec3c501f606b39e1b17fdf2d20ac064fdb2e1fb9311ed02a75f9eb9a0a

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