Malicious PDF — malware analysis report

Static analysis result for SHA-256 608707470360c980…

MALICIOUS

PDF

108.2 KB Created: 2021-09-17 03:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ada0d25442152cd16c7bc445b033e6a8 SHA-1: 4574d8b3ef982db79049ea641d86d98a5a7dce0e SHA-256: 608707470360c98001b5309a3b2fe2bc3345df052f36b0f01fd6919194e61ba0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to domains associated with link farms or disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://synerhu.ru/uplcv?utm_term=batman+the+killing+joke+comic+pdf PDF link annotation
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16143c384d8abf---kemuxegesavuverujim.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/48941022729.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/xabowusodem.pdfIn PDF document text
    • https://sabresources.com/FCKuploads/file/30038661632.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/xodepalapudejajobuj.pdfIn PDF document text
    • https://baoholaodong24.baohohoanglong.com/userfiles/file/pefigifogokerafekudewe.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/jamapitaxavijaw.pdfIn PDF document text
    • http://rorolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/malitezamegusazivije.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/jamelovejalino.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/36175395750.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/juwijumufolep.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/33248387316.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/10773652897.pdfIn PDF document text
    • https://cecprint.com/images/file/menewabizef.pdfIn PDF document text
    • http://chuabenhxuongkhop24h.com/images/files/33094875286.pdfIn PDF document text
    • https://vleek.com/uploads/files/62172283503.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/f24a6848dedd9fec552d22168f3c6915/16268157539.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/42338094598.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/2542968842.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/4092152058.pdfIn PDF document text
    • http://mega.kz/media/upload/files/merodatijuvefatapara.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_off00014303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14303 18216 bytes
SHA-256: ca82d538753eba56a4d8918e69c5941e3a6edc73d37120cda50285b54e11bb49
font_01_sfnt_off00017242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17242 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A59 11072 bytes
SHA-256: 5acd9bf357e68e578ba8edc78d7be7928b54981490ab02377c0b03bcfbb3ec3e

Open this report in the interactive analyzer, or submit your own file for analysis.