Malicious PDF — malware analysis report

Static analysis result for SHA-256 96115cc77d2ebbc0…

MALICIOUS

PDF

97.7 KB Created: 2021-06-13 06:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 380302e2736a8af46293c0eca843017d SHA-1: abb823afb15bef547292cf7c2d03d2e0f8c918e4 SHA-256: 96115cc77d2ebbc0fc2560b274c5cf746221039b516a21460fa980732a80f24a
184 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading a malicious file. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://archism.ru/uplcv?utm_term=kgf+ringtone+original PDF link annotation
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16087cc1f72667---72723270988.pdfIn PDF document text
    • http://btc-ltd.com/upload/file/dawegulikilabefanosini.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c9cc201be---bazufobekep.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/a61f8426e9abfef1be3e1fb553af07cc/wufirokojisopake.pdfIn PDF document text
    • https://rajaunited.com/contents//files/vowavosofuresorokenofak.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/acd48cd8de604f87958936a3ae832e34/pogubekimulosuzi.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdd5151f72---42881594138.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/5bf9f6c5a0efeb52d2d01d9fe3478c00/82314925728.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3e7809210---nipefukagoxapuferi.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/98984102300.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5b2acc7e3---tibonidunawuborofulugi.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/a21cdaae50d0120cc12885e18b877b88/mowugovejewikukagiresa.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d39a9e4352---wekotilapilarelutamazir.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/cb0755e12e299eb5e50b23251e8fbd47/28021882825.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a071fb8b464abcd612406ee73a86288c/32287875642.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 4724 bytes
SHA-256: 6441722219a9ca317edfd98f482f432ea5347e152ad11fe8db608374eb3c1652
font_01_sfnt_off0000fbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC4 4460 bytes
SHA-256: 08198fde5ae58084391644f4ee9d612299c9c1e05aa960503a57e74dd0047221
font_02_sfnt_off00010b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B64 5248 bytes
SHA-256: 64f97ca8c608b1203e68571b5ae3e590585ba5ddb473c9a8c30b35656797f085
font_03_sfnt_off00011da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA9 3024 bytes
SHA-256: 899f9e8a20344d7159a767c71c5047be3d3fe83be54f1b102c132154e7879fcd
font_04_sfnt_off00012a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A34 10840 bytes
SHA-256: 2940a870cab663c93ebfab2f464e21666ea93aaee60175e30c6604e94c06b3e3
font_05_sfnt_off00014fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FA9 16232 bytes
SHA-256: c86edb1500518f996d949789c7acabb25df74e40a65a1d1b61da724f3db8e51b
font_06_sfnt_off0001653e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1653E 5072 bytes
SHA-256: 1357d10448fa5331cfaac2aea2706f7b6fbedb24151abc485482e95aef614af9

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