Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea9170de23623ef…

MALICIOUS

PDF

78.8 KB Created: 2021-09-12 05:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9a436a8ca260810843101d0838962e5d SHA-1: 45cdfa0622c12eea1c18d28cc48f6d0cc269dcf9 SHA-256: 9ea9170de23623ef704f62eda35ff9468ee1732f1e87e198849d3d368bfa6a78
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm patterns, indicating it's designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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 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://pistant.ru/uplcv?utm_term=call+of+duty+mobile+cod+points+free PDF link annotation
    • https://livewireeventz.com/userfiles/file/32107713811.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/mosazikofepari.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/jd47at0fejaui9i9mlfmpomk2h/xujegipagive.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/40990085040.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/ponosafuv.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/80611553560.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/xazixuloxe.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/vitiboxobajubu.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307e78cd7d4---50847858281.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/xobon.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/bijelipur.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/68094129578.pdfIn PDF document text
    • https://hunghiephuylog.com/upload/files/mivaboroxoketadelukizudu.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/34612231042.pdfIn PDF document text
    • https://mpressivelabels.com.au/application/third_party/ckfinder/userfiles/files/lewirumekogoxewosimujiwo.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/lubamulowodirug.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613437c5d636d---26849347625.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/xenabozidijatulewu.pdfIn PDF document text
    • http://miyozenemeryville.com/uploads/files/tebewewenajabukiviraza.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/zedaverevu.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/dufiloxodivegusotosotes.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613697317f96a---12130408743.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/95028c7d04c627579ccf2ca827437694/jamogufepizajefuruw.pdfIn PDF document text
    • https://emenu.hu/editor_up/60502013722.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD36 17656 bytes
SHA-256: 95a694ff00fffb16432ae2435ac1c8fd928d5cadf5cc15e60e1bb52f4575488d
font_01_sfnt_off0000fb3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3D 11168 bytes
SHA-256: 67fdc89e433157a1c2f74edb75d88cf8e01858d4f245956c5e7d81e3a7880cd6
font_02_sfnt_off0001152f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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