Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc0b54fba1f8d97…

MALICIOUS

PDF

95.4 KB Created: 2021-03-17 10:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f5e8516cdf23a547ee77a0e59688b4a SHA-1: 9f7ef14a9e27649f4f05bfd5bbc80c421366c6d4 SHA-256: 4fc0b54fba1f8d976c9b8f923259eff453bbd605ac9c00e3f37b693a1b4a2469
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=the+great+american+songbook+pdf
    • http://tufurujepuduxop.22web.org/how_to_find_terminal_velocity_formula.pdf
    • http://fapokopo.22web.org/atharva_veda_malayalam_free_download.pdf
    • http://silofabinewu.22web.org/39700162619.pdf
    • http://formulamoney.top/61000271413f9kw8.pdf
    • http://fullpisetc.ru/define_depth_of_knowledgehot5v.pdf
    • http://organicsss.space/lerugik6e4w.pdf
    • http://hookup668.site/cub_cadet_ltx_1045_deck_partsgh0uj.pdf
    • http://giviwopifa.22web.org/how_to_use_splat_10_wash_hair_dye.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tiwebukesa.epizy.com/comedy_movies_2017.pdf
    • https://uploads.strikinglycdn.com/files/0ca2ae4d-81a1-4a66-a71b-b5906cde2bc6/gukafitej.pdf
    • http://kisolapuri.rf.gd/zagexivojika.pdf
    • https://uploads.strikinglycdn.com/files/de3d80ac-1898-4a95-899c-3c57d3796731/mackie_cfx12_mkii_specs.pdf
    • http://wajalapivibobi.epizy.com/formule_de_harris_et_benedict.pdf
    • http://zawumowu.rf.gd/57631481673.pdf
    • http://dogurof.epizy.com/bowknot_platform_flat_sandals.pdf
    • http://mesuwirafifi.rf.gd/35329767824.pdf
    • http://nutujetis.rf.gd/62472331203.pdf
    • http://vidabovon.epizy.com/74774814790.pdf
    • https://uploads.strikinglycdn.com/files/ffde74b9-4156-48a6-af8d-ade31088f2d7/briggs_and_stratton_20_hp_engine_oil_filter.pdf
    • https://uploads.strikinglycdn.com/files/aeee545c-37a0-46ad-84d2-ced386a7f8a8/45498477984.pdf
    • http://dabogubomukifu.rf.gd/watugupanixigab.pdf
    • http://pisibide.epizy.com/tooth_avulsion_case_report.pdf
    • http://fekaratog.rf.gd/paediatric_neurological_examination.pdf
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001361d.bin
df5dcc2e0f4a11a124aaa44c48d2dd3569ab29a26e483fa4d2f840a9ccd45c1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1361D 5692 bytes
font_01_sfnt_off00014951.bin
21c8a9ecef39dcd052f4ce7261b00777e2f30c4c4c9e55b60c464a8bd089b788
pdf-font-stream PDF embedded font (sfnt) at offset 0x14951 11452 bytes