Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7625dc74e3f582a…

MALICIOUS

PDF

91.0 KB Created: 2021-03-23 23:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4defd30d85b1299396152937785abd1e SHA-1: 741c154ec7d77a8243964a94d8189a1818d623be SHA-256: c7625dc74e3f582a590189a446241768eb1fd6206b1e258e2d0ec1ff1585ca8c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The document body, though partially corrupted, suggests a lure related to a video game achievement guide. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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
  • 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://bologen.ru/wix?keyword=into+the+breach+achievement+guide
    • https://fulotetaputu.weebly.com/uploads/1/3/2/7/132740707/78f241e3c.pdf
    • https://giriwegulajujup.weebly.com/uploads/1/3/4/3/134320738/wuxitisodiga.pdf
    • https://ruwivogisi.weebly.com/uploads/1/3/4/2/134265822/495ed.pdf
    • https://terodovob.weebly.com/uploads/1/3/0/7/130776228/d6fa62af.pdf
    • https://kawififelotus.weebly.com/uploads/1/3/1/4/131437833/sepawovipefubof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gefivif.epizy.com/airfix_model_world_november_2020.pdf
    • https://s3.amazonaws.com/ruzumeb/software_update_garmin_gpsmap_62st.pdf
    • https://s3.amazonaws.com/dowavelaxam/analytics_report_chart_salesforce.pdf
    • http://buzuxujov.epizy.com/medidas_formato_a4_para_dibujo.pdf
    • https://s3.amazonaws.com/xeruxaxer/zujekafek.pdf
    • http://zizinamejukurep.rf.gd/accidente_cerebrovascular_hemorragico_fisiopatologia.pdf
    • https://s3.amazonaws.com/sebunuzu/93951810992.pdf
    • https://s3.amazonaws.com/gezetega/ge_jvm7195skss_manual.pdf
    • https://s3.amazonaws.com/pexodugosa/61959246803.pdf
    • https://s3.amazonaws.com/fovezewi/werevebek.pdf
    • https://s3.amazonaws.com/desekusoxi/94177617826.pdf
    • https://s3.amazonaws.com/tejuvonixag/nidapujexifimunade.pdf
    • https://s3.amazonaws.com/lewuli/guide_baedeker_de_agostini.pdf
    • http://pufovipejofag.epizy.com/extension_flash_player_pour_chrome.pdf
    • https://s3.amazonaws.com/mubefula/picsart_gold_mod_apk_2018.pdf
    • https://s3.amazonaws.com/filidabut/ielts_band_7.pdf
    • https://s3.amazonaws.com/jojitagifuva/67865215907.pdf
    • https://s3.amazonaws.com/gatazeromij/27049745290.pdf
    • https://s3.amazonaws.com/mubefula/do_top_loading_washing_machines_have_filters_to_clean.pdf
    • https://s3.amazonaws.com/mokamoba/newsletter_templates_freepik.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_off0001286b.bin
2643a23e333e7d3df50448220fdc97a2b63078c3b5bccc1d246795f3add38291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1286B 5280 bytes
font_01_sfnt_off00013a37.bin
76ab142b547b4755e0ef0bd0f4eae24e8e9361f433669a3e1cb1f5ba509d120e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A37 10600 bytes

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