Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade0b2f301b57c8a…

MALICIOUS

PDF

91.4 KB Created: 2021-07-06 16:41:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a6ab37b474c878783d25e4eaebe797b SHA-1: 4b03898748ddfa52305ccb6677447ec6b5557133 SHA-256: ade0b2f301b57c8a4c2ee8acb242340252654e7c33e200cade32b202629f2805
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to external resources hosted on compromised CMS platforms, suggesting an attempt to host malicious content. The 'SE_CLICKFIX' heuristic indicates the document instructs the user to execute commands, a common social engineering tactic to bypass macro restrictions and initiate payload download. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb73c4851c---seligixi.pdf
    • http://bafiti.com/sklep/userfiles/file/vonupomuwotovegeziguseme.pdf
    • https://lawyerupsmart.com/tempimg/file/92597961338.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794a30e023e---vibujezazijakoz.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/c198c995f5b99ec1e345f94fc6a4fde8/20413620624.pdf
    • https://begili.com/uploads/image/files/ragoxadoxaxavuzadu.pdf
    • http://slsnn.ru/content/files/jazalokuwuwa.pdf
    • http://myphamhelios.vn/luutru/files/76724714221.pdf
    • https://soudurelausiere.ca/upload/editor/file/gesemilebinegogeko.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/c9ccace8cd0bc942670abb063a180469/rigomavirumatodigevixesij.pdf
    • http://circuitoinsulargc.com/documentos/file/ralufat.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e6ff43e2a---56922693045.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/cm2ke0kiqqf8mjjrcno4lmjkq5/bekejogumig.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa6fcd7b87---nasirutavat.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/0dsgs6tsvfhnpjrkd5h60gg621/lamis.pdf
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/vakiretiruriwepuwagokado.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160799cd195277---wivetofixekemesadok.pdf
    • http://e-skala.pl/userfiles/file/79538732096.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b53ffed267---jeniliredosudixobo.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb89907fcb---jemazigizuwed.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/g9ovnj4bq09883odculvt05b0r/woxororilisojewusoxadezug.pdf
    • http://absolutelyneon.com/userfiles/file/tasurilatuginoluzokojime.pdf
    • http://tdfinalists.ca/clients/43449/File/44184094371.pdf
    • http://abacusnancy.com/userfiles/file/80904322550.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1121e92d7b---zakipofabugunijar.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=new+3ds+xl+128gb+sd+card
    • 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_off0000ffa5.bin
5581fcc672072ff378b15cb27444a21968b1671b3859a63ffe1ccfd8215bdf37
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA5 10988 bytes
font_01_sfnt_off00011956.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11956 16792 bytes
font_02_sfnt_off00013168.bin
8e6f8aa7289172f9b49d31a94c5d9b8553179ee15eed0f77ce91b0988f36c841
pdf-font-stream PDF embedded font (sfnt) at offset 0x13168 17276 bytes