Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa97f27500eba0fb…

MALICIOUS

PDF

92.1 KB Created: 2021-10-11 20:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 80dcd22e058817bdcf5a03b146439fe3 SHA-1: b5cbe5ef91271e155d691b431044ca7ea7480f9e SHA-256: fa97f27500eba0fb8cac350508dc67e92479ae8d0f81c022a510ffb97937eaf7
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://perfecthospitals.org/ckfinder/userfiles/files/palovepanajevodujupu.pdf In PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16146b3ff040e9---pekupiwejakuguvaweka.pdfIn PDF document text
    • http://strandedtattoo.net/file/vatanexegazeda.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/99380700201.pdfIn PDF document text
    • http://lnv-cnc.gr/userfiles/file/35822536125.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/bavojowepimakagafeged.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20211006170225.pdfIn PDF document text
    • https://vestol.bg/files/file/39601941929.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/manoxuwurasad.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/93736342090.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/63091955419.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/tawoxeranudipeji.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/forixivajunojej.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/bijiw.pdfIn PDF document text
    • http://zimmerei-possert.at/35105852647.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/99987362328.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/c78839d24c9e32ae2993434328792a0e/juxebuboxozadexufa.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402f581eb6d---51684683934.pdfIn PDF document text
    • http://riviera.az/userfiles/file/bopavu.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/23828182583.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-10-9/20211009035210252208.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/43150879061.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/23D8k0Ec_6w/uplcv?utm_term=daniel+day+lewis+and+michelle+pfeifferPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74B 10868 bytes
SHA-256: 0d43c15b0209143a71dc883a4b5ca0e0691f3f0a59da0f450083383eaa081f9a
font_01_sfnt_off00011038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11038 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001284a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284A 21956 bytes
SHA-256: 604f56dcf578928797b633847cd5336699f9b5aa30203fbd4c064d5130448a3a