Malicious PDF — malware analysis report

Static analysis result for SHA-256 32689cba6919249d…

MALICIOUS

PDF

79.8 KB Created: 2021-09-02 08:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30625e2fad904b5b5eafd82afe3aa164 SHA-1: 95fcf4b8938ce13b07e3157656f11ec87c80cb66 SHA-256: 32689cba6919249df5f7d6f53255c0d99aef069c192675aeba7b0217e2701b22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://zehanbiopharma.com/upload/files/muxejujunenebenogod.pdf
    • https://aashianarealty.com/file/gorexozogadonilitexa.pdf
    • http://abovomedia.hu/_user/file/ximodisubojakowa.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a90d019808198d3e7e02e080daa38aeb/lalajanof.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864c981b395---36704834387.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160846bcecaf4d---sarafazivebajemimo.pdf
    • http://megat.pl/uploaded/fck_files/file/49222348016.pdf
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/31404157495.pdf
    • http://goref.ru/files/file/50494074565.pdf
    • http://metaglas.kr/userData/board/file/31398872083.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/8485f6ca316a44d37a41355991772ebb/50248195434.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/71021748051.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/27951472493.pdf
    • http://alituncer.com/userfiles/file/sigitemuseku.pdf
    • http://abnicum.com/files/file/97830698100.pdf
    • https://mrdak.cc/uploadfile/files/69726756235.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606dff8de0bfa---19439050011.pdf
    • http://dwhs79.com/clients/15834/File/47966016839.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c29b9377221---xudaxesopikitimof.pdf
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/7dbcb6427b30d3f8fa41cb1035b5b3bb/59421676912.pdf
    • http://skomi.ru/img/files/file/12329742505.pdf
    • http://orvosvalaszto.hu/uploads/files/fezafuloduzabemujemevedi.pdf
    • http://stpatricksreunion.com/clients/84553/File/47577134753.pdf
    • http://atenngo.com/admin/sites/site/documents/fofujoxuzifuziragogefon.pdf
    • https://prcomponents.com/ckfinder/userfiles/files/89005309055.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=harvest+moon+ds+guide+book
    • 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_off0000cfff.bin
04d55f060fefa8c15f5a25189e7dd9a903b02d73f29a1e85f40a3af5c498ec9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFF 18132 bytes
font_01_sfnt_off0000ff2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2B 16792 bytes
font_02_sfnt_off00011742.bin
db1794d1f2eebd9d1bfde42fc6264708756e4ddf352851748eff66389f82c81d
pdf-font-stream PDF embedded font (sfnt) at offset 0x11742 10936 bytes