Malicious PDF — malware analysis report

Static analysis result for SHA-256 a026c0202267b17e…

MALICIOUS

PDF

89.5 KB Created: 2021-07-01 15:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ea4c9223bea83e8861cdc5c76c45506f SHA-1: 70facb44ba395635d88c4e6d48daaa7531f019eb SHA-256: a026c0202267b17e0e9740738a2975373b819e76e9b0d9a3b5f022d8a54bce08
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and numerous external links suggest it's designed to lure users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://philabc.ru/uplcv?utm_term=lake+pane+campground+ielts+listening+answers
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/c06a0fa657a15faefe1162b61b9fe4b3/magedejopa.pdf
    • https://anmoul.com/userfiles/file/10455424643.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a24fcfbeb35---mitamomule.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/28557f36ca2a62a1b017318833e5f639/bosaxajekapojerilixonezom.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b892e6b2cb6---82154292449.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9f817f2b6---69825642272.pdf
    • https://iwnta.com/userfiles/file/95901959235.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/8371f8217cd627278271bf6889355b1b/dirubavamibugopilodi.pdf
    • https://arerp.kr/data/file///61589127655.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094787f19dfb---24879170215.pdf
    • http://prociweb.hu/sites/files/file/43443972426.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/9d8cd2869bd6bca41b94c1d9f2875cfa/90641598342.pdf
    • http://agcslohian.com/userfiles/file/tirubifo.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d605503e5c4---fixeterojijupomavub.pdf
    • https://stijsr.com/userfiles/file/daker.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11fdd23fd9---rufupabapavixetu.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/53782155476.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/h383k20hcasbsfk2sgeoq1gm7r/rovijebokezoma.pdf
    • http://westernmaki.com/uploads/files/73847599771.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/6b51238fd9cd3ec584d7c6c1b0e24659/26745023027.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6c7154294fec8c56eb620bca175a78f5/80903320278.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/wufirogagiwelime.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/5cbc32cc017827a81d6662520cbc76a9/89351328329.pdf
    • http://sungwoneng.com/upfile_editor/2021/files/weseku.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/4dnp5jqu0v251qgdqi2g8gis08/lokaturijipigumoxad.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd3f.bin
eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3F 16132 bytes
font_01_sfnt_off0000f2b1.bin
d127f05f8e23be59aea312ce0f82d9d4f0ef55c04b41a9fe3fc6f91638deb3f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 11092 bytes
font_02_sfnt_off00010c65.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 16792 bytes
font_03_sfnt_off00012477.bin
5dfe04865a27c68a78f45daa8ac980dc9d9b7187d1f8ce40a058425946230055		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12477 19256 bytes

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