Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c69513dbfad9ee…

MALICIOUS

PDF

80.5 KB Created: 2021-07-01 12:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee8e416690a8d55f143baf63ecab882e SHA-1: e821cf6a77afbd6a693aba805614828a9ac78d48 SHA-256: 34c69513dbfad9ee1f58c08e198394b683c839aa09eb02aa47cce48544f3b691
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the embedded URLs and heuristic firings point to a malicious link distribution pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/4270874e3c519809c4284e909287066c/19865215775.pdf
    • http://ahxxzx.com/userfiles/202105/file/dudurizavi.pdf
    • http://bajcsidavidfoto.com/_user/file/bibum.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a896e5b5fc9924b5e00cfc72504f4233/fokukogu.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/gvab3dqi68ja4tvj9iv48rc0qe/91354523022.pdf
    • http://jp-cable.com/d/files/misaporumeniwi.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/2c585710f00a97b93d4db76f971c06de/94022837300.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759238b19fd---47784168271.pdf
    • http://angelofthewinds.org/ckfinder/userfiles/files/gabowok.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/f1438f758a720af3f97e057c36ead1bf/26103122918.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078354382d53---56222927210.pdf
    • http://adaviestransportltd.com/userfiles/file/fogusikenuxix.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/14973423697.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f00a193ad---dujuvosa.pdf
    • http://banglenhospital.com/UserFiles/File/73634238904.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/d0cc71983b67d588975e1362aa5769e3/33565542204.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/s7cr4nh8s40r86qjs56987nk4v/fifumevovop.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/7795ab3210fe1fc155e32cc072f42fef/joxopurakenejatirogenotu.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999441eb9ef---nogidewag.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/kqtfmc6v5vab0cehhj57q8qpnf/majibuxuso.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac29f5e159d---95743562769.pdf
    • http://palenice.net/obrazky_clanky/file/38626886223.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090c739a5e4f---diworono.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=me+before+you+book+online+download
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c5.bin
6331d3f914325040219015b7896f7fb439cf1f9fe90ebd9b3091a9fc16eca4e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 10604 bytes
font_01_sfnt_off0000f123.bin
374ba6eccf61e1ae6a13a17c5faf86747eb67d079d81bc9c62f1e3967d119fcb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 16684 bytes
font_02_sfnt_off00011c97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C97 16792 bytes