Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cfaa7a330663a2b…

MALICIOUS

PDF

78.0 KB Created: 2021-09-13 01:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b162d493d410c6eaf5ba23e45ff51789 SHA-1: 65fc7e3229eaf4d4c55a2776baaa1d974a891ddd SHA-256: 5cfaa7a330663a2bb129216a927b96d2753970aa9caa3aec0c6b711c37d380a4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript T1553.005 Security Software Installation

The file was detected by ClamAV as a phishing trojan and ML classifiers indicate a high probability of maliciousness. The document body, though obfuscated, contains instructions to disable security software, a common tactic in phishing and malware delivery. Numerous embedded URLs, many hosted on compromised WordPress sites or disposable domains, suggest a link farm designed to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://pixomot.ru/uplcv?utm_term=call+of+ops+2+unblocked PDF link annotation
    • https://gegeny.hu/uploads/file/ririd.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/sinajiwafivalu.pdfIn PDF document text
    • http://medi-sen.com/files/files/pufupisotujojuximuxuxole.pdfIn PDF document text
    • http://www.superior-inkjet.com/login/ckfinder/userfiles/files/97577373652.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/jebisoridemesolomab.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/mojuzen.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/derekijipezirim.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/famomedarer.pdfIn PDF document text
    • http://mq-water.net/upload/36101567482.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/49868110206.pdfIn PDF document text
    • http://qwerty.pl/_data/file/38178224554.pdfIn PDF document text
    • http://lagostena.it/userfiles/files/84719342118.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/futimupixog.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16136742de5752---wuvudetodoro.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/79905963301.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/wanewobolisowesokugu.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/majabifexilasixugepi.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/95343331132.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/53711809078.pdfIn PDF document text
    • http://someteme.com/archivos/_20210910024337.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/jivume.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/kalasikiwaxafejisaduvum.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/88347202175.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ee2a133d0---pebogibigorus.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/mezasiribesafemagaviki.pdfIn PDF document text
    • http://monikaknoblochova.com/userfiles/file/57167475899.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6f7cc30d3---48958334651.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97C 10804 bytes
SHA-256: 22eeab79269d91891260fdd643931277784fd6a5aaa390fc59531c174730a88d
font_01_sfnt_off0000e263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE263 18276 bytes
SHA-256: 12c7c642e328fe33ec47fd6fc43289b633af17a7fb7b11e9a651025ae7b6a19a
font_02_sfnt_off00011261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11261 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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