Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba128047ecc1885…

MALICIOUS

PDF

100.7 KB Created: 2021-05-12 15:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8233dffdbba96ebd61d7beb9e7427f75 SHA-1: 7d4baeb038e7e1ea5b223eb1e16fdbf5e51ab88a SHA-256: eba128047ecc18858d902a1943ec1e7cd4038538afb71902abef170af328f29a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of a 'download' button lure further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/strik?utm_term=navneet+dictionary+english+to+gujarati+pdf+download
    • https://cdn-cms.f-static.net/uploads/4374181/normal_60283a6b2784a.pdf
    • https://davijonixumitu.weebly.com/uploads/1/3/5/3/135349017/redofogi.pdf
    • http://siparuzavikowut.iblogger.org/business_letter_writing_books_free_download.pdf
    • https://rugomekedakore.weebly.com/uploads/1/3/5/3/135302214/xexunevekivekogopow.pdf
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/tubijopuxup.pdf
    • https://static.s123-cdn-static.com/uploads/4452587/normal_600810cd211d8.pdf
    • http://fawatakixur.iblogger.org/trigonometric_identities_1_worksheet_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4489969/normal_5fe63c675bbd3.pdf
    • https://cdn-cms.f-static.net/uploads/4464709/normal_606e32a7f19ab.pdf
    • https://static.s123-cdn-static.com/uploads/4471273/normal_5ff3a0996b05e.pdf
    • http://watomidipokaki.22web.org/tex_jpg_eps.pdf
    • https://viremekim.weebly.com/uploads/1/3/1/4/131407965/9208773.pdf
    • http://fancli.com/1bmtrs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_7c89d4f07eaa443aa0cfe7c12d25b2c0.pdf?index=true
    • https://s3.amazonaws.com/jebokizez/mycobacterium_tuberculosis_granuloma_formation.pdf
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_aed6c8052fc5468ba6995140e05abad3.pdf?index=true
    • https://3789e5f8-265e-48cd-8836-241a044b7ceb.filesusr.com/ugd/45ef7e_d62fa5049cb9415681cd4461e1506bfd.pdf?index=true
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_73a9fb41f5344ec0b4dffa029773f76b.pdf?index=true
    • https://s3.amazonaws.com/livivuvuwugeb/57372950843.pdf
    • http://gamojusefefojor.epizy.com/17106941907.pdf
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_c18f34db50f74818a65536c89a4afa0f.pdf?index=true
    • https://436010f1-0dd7-4950-aec0-3bdf337573e8.filesusr.com/ugd/5a4c69_129f462fb45c4e7888a5524ca874f3b6.pdf?index=true
    • http://kudurefusi.epizy.com/nixajiguzigozux.pdf
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_c7077996ef984490935acc4bf87336a1.pdf?index=true
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011baa.bin
16114495c85ac14abd84e77b561542f8ec61d140f5966320262b1b50a58df64e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAA 5716 bytes
font_01_sfnt_off00012f46.bin
c0b19640ce5104cb562d203548d06eca56e782a0ebbe25d1062069d96502ad1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F46 12804 bytes
font_02_sfnt_off0001598e.bin
bb755e6e3d11ad9a8bbc02a11c440163ae7e693eeaac8235bd8307b0fad9c60b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1598E 16192 bytes
font_03_sfnt_off00016f0e.bin
071e7ec65a50337d0abf54a16cf77fac63f85f5d67e33a1ff3eb9a012147c3ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F0E 5904 bytes