Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffebeed4102b433…

MALICIOUS

PDF

101.3 KB Created: 2021-06-27 00:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b3e9cb027518d70df26b6e3ba59fd54 SHA-1: ca99a0be7855ae975b1af3d376d9c293b3a23315 SHA-256: 2ffebeed4102b4335b4803cf79c38215625abf23f9e66a0a8d76c121aac7da5d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan distribution vehicle. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on various domains, some of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://boumqueur-edition.com/upload/fckeditor/file/sedom.pdf
    • http://slstudio.it/userfiles/files/muvurerigamulotaviwuxoki.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/42feea3f1c5ec73c4c3d376d1b7fbae3/pofamizabobubazudogomu.pdf
    • http://amandamaitland.com/images/file/82741745039.pdf
    • https://mbzl-pro.xyz/web/img/podborky/files/80267882007.pdf
    • http://dzbnf.com/upload/file///novesegijuvivimifulud.pdf
    • http://terezmisszio.eu/files/file/41901358679.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97e0313f16---turogodiwumotosarax.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e47b3c885---90047269682.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160742691d2bf7---xefezemiwawev.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ci0fobkhm87j1ag9cnf3bp9ss3/66547315690.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/ubnehdpoknpo6556ua01ajbk68/purupitisezagosegamimuw.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5952a79adc---tefexitefepavapede.pdf
    • https://ayurvedaemart.com/uploads/file/382530582.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/50bab5e9209f409558da3fc67276a6da/legolarima.pdf
    • http://dekoblickfang.de/userfiles/file/suxeranupesetotozo.pdf
    • http://tragadsonisurat.com/ckfinder/userfiles/files/kesalof.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd6d8f2d47---8593431073.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/ac58b0ce871abba3f5a55d27695b7cbf/32757384994.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c7df8be7c47c8272584c430c2b0d45ca/fonaporizoxa.pdf
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/gr820iq6q3f91g91uj7at9v955/fajinekame.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d3bb338c1b7---13873316418.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/c5g46oafa9l7fg4rm1mn2e04e8/rusoperedes.pdf
    • http://geraldkleinlaw.com/ckfinder/userfiles/files/xavepopifujikutejexu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=what+is+an+apostle+in+the+five+fold+ministry
    • 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_off000127fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127FE 16792 bytes
font_01_sfnt_off00014015.bin
f7276a61f043a857b50f36f60a867377c8c67283c26f6459d946059a73f0be7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x14015 10936 bytes
font_02_sfnt_off00015943.bin
5de0de7bb4ef2e28188db3cf1ecd99e30a66dd1ab88251e6c0e4b50790ef6adf
pdf-font-stream PDF embedded font (sfnt) at offset 0x15943 17272 bytes