Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc128846c210f266…

MALICIOUS

PDF

89.4 KB Created: 2021-03-05 12:32:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bd7d08a429da1d9869d29c98da2c4bdc SHA-1: 5f37cbfe51ea2aa5ee83ad31d100d4dcc5486354 SHA-256: dc128846c210f266e23bf108ecb1d4801952a3fe18aa2e1ac4be856a680cdd15
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://lozipotod.ru/wix?keyword=pro+asp+net+mvc+5+pdf+espa%25C3%25B1ol PDF link annotation
    • https://welavomuwaj.weebly.com/uploads/1/3/4/6/134633166/zijubowipajiwefopawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461250/normal_6037ebf0dfcaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461523/normal_6012d480378e3.pdfIn PDF document text
    • https://bagawilikazukir.weebly.com/uploads/1/3/1/0/131070307/957126.pdfIn PDF document text
    • https://labajamipudoxa.weebly.com/uploads/1/3/5/3/135399896/reledebatuw.pdfIn PDF document text
    • https://dimavuvinidet.weebly.com/uploads/1/3/1/3/131397938/vawalanu-toduwewugemuve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447647/normal_6003254788a6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_603413268faff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_6038629581157.pdfIn PDF document text
    • http://bovinuxunegobi.iblogger.org/how_to_find_total_cost_from_demand_function.pdfIn PDF document text
    • https://kovuvewu.weebly.com/uploads/1/3/2/6/132695697/vukojokol.pdfIn PDF document text
    • http://lubevos.scienceontheweb.net/is_headphone_zone_legit.pdfIn PDF document text
    • https://jipoditilab.weebly.com/uploads/1/3/1/4/131407274/vagobav-dewiw-fumalene-zoneb.pdfIn PDF document text
    • http://fivabigenarewo.22web.org/fubob.pdfIn PDF document text
    • https://ramasiwo.weebly.com/uploads/1/3/5/3/135390431/fomisiwologi-sepopunisepiwuv-pudem-fizire.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lavususixufera.rf.gd/ikea_malm_low_bed_storage.pdfIn PDF document text
    • http://gonegexunu.myartsonline.com/75762199.pdfIn PDF document text
    • http://dilabopitomosif.epizy.com/autosar_adaptive_platform_security.pdfIn PDF document text
    • http://redowana.epizy.com/72000292673.pdfIn PDF document text
    • http://vomozenofeke.epizy.com/naza_m_lite_v2_firmware.pdfIn PDF document text
    • http://kezitiw.epizy.com/fimuvolezofepud.pdfIn PDF document text
    • http://milodip.epizy.com/barbearian_full_apk.pdfIn PDF document text
    • http://vepitejususas.atwebpages.com/26052712849.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/11223814921.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001120b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120B 5436 bytes
SHA-256: bb13debc49311b284e2ff97ae4d5aeafc7ffee5ae7d64bce4d26e7bc1c6b9e4d
font_01_sfnt_off00012437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12437 10456 bytes
SHA-256: 211073237edbfb2240d662f4a5bc361638491ff3bc1229dc84e7675bdc741ad1
font_02_sfnt_off000147b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230