Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee6054911e30aec…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 14:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ad0de280116447430b3ad7571051f392 SHA-1: 74581e8bcb7d18472e77c690701b13c89f51652b SHA-256: bee6054911e30aecc0c071ba5e2c526acc565437135e2a32b2555fb80dea044f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://philabc.ru/uplcv?utm_term=shock+docs+the+devil+made+me+do+it+watch+online PDF link annotation
    • http://podarox.ru/public/files/riliro.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/83782950352.pdfIn PDF document text
    • https://akilanews.com/ckfinder/userfiles/files/pomedafixujufawotijen.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///jenodatejibav.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/matuseniponobesegudalota.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe18b8b210---24644421502.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/98489685681.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/tewijafejixijibowobegi.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/bomuxamavisef.pdfIn PDF document text
    • http://klccpa.com/userfiles/file/77777412540.pdfIn PDF document text
    • http://architettotamborra.eu/userfiles/files/zowadizuz.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/minodo.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/56300477263.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614392a90b2fb---xulajivokigore.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9e0ca4614---4484650516.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/17657991378.pdfIn PDF document text
    • https://cahayaapi1.com/contents/files/tuvovibum.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/32540349427.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161408e0a84a1f---kibokazolukito.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/19874861787.pdfIn PDF document text
    • https://artcorner-fiberglass.com/userfiles/files/wawivurojumetoxutofu.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_off0000d633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD633 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 10856 bytes
SHA-256: 0b3aefa14b08ad8da2844d428d926e07f8993b2cf8899761102c47817be16f3e
font_02_sfnt_off0001073e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073E 17736 bytes
SHA-256: 7820942f2e97aac915df999e1677b94ce86ec19353ef249439ed6292029dc6c3