Malicious PDF — malware analysis report

Static analysis result for SHA-256 a205900ea8e86dd3…

MALICIOUS

PDF

81.4 KB Created: 2021-05-07 09:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9324e189f2b6244032a49c08aa635c34 SHA-1: 8f46e99699f0c8149d8a82fd597679f22d127c80 SHA-256: a205900ea8e86dd34a624b3bb75a429ff618068692d58a8a6137b760940acfb4
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an external URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though partially corrupted, suggests a lure related to a security guide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://midufefew.ru/strik?utm_term=security%252B+guide+to+network+security+fundamentals+mark+ciampa
    • http://bibopasaxuvibu.mypressonline.com/after_effects_tutorial_free_download.pdf
    • https://cdn.sqhk.co/lapefuxolu/cjd8tjd/download_world_minecraft_pe_survival.pdf
    • https://cdn-cms.f-static.net/uploads/4387411/normal_60695fdb1d771.pdf
    • https://cdn.sqhk.co/dofexoxev/t9dneha/bewimedikadetebuwebofemev.pdf
    • https://cdn-cms.f-static.net/uploads/4473053/normal_6032aa5a53f03.pdf
    • https://cdn.sqhk.co/ragebobeb/jggeBAG/screen_recorder_windows_10_online.pdf
    • http://gojawufeki.getenjoyment.net/sukobuvedufalu.pdf
    • https://cdn.sqhk.co/libuzewis/gfcBgdS/zavarov.pdf
    • http://vozaxakinexu.iblogger.org/business_plan_sensitivity_analysis_template.pdf
    • https://cdn.sqhk.co/jagakutojut/U1XlH5F/great_soccer_skills_to_learn.pdf
    • https://cdn.sqhk.co/jimikafede/czgdie1/15094425762.pdf
    • https://cdn.sqhk.co/devisojop/jdGicwl/24963583416.pdf
    • https://static.s123-cdn-static.com/uploads/4461485/normal_60034194c3e7a.pdf
    • https://cdn.sqhk.co/kokojisip/icmiaM7/kuzudotomijaxegimu.pdf
    • https://cdn-cms.f-static.net/uploads/4445889/normal_6045f8ee6727f.pdf
    • https://static.s123-cdn-static.com/uploads/4459941/normal_5ff1b5f470ee0.pdf
    • http://misujupino.getenjoyment.net/pdf_binary_to_base64_javascript.pdf
    • https://cdn.sqhk.co/mapiwoda/mXiahbg/ncc_c_certificate_exam_syllabus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pululusodogi/captopril_25_mg_bula.pdf
    • https://s3.amazonaws.com/salade/how_much_weight_can_a_15_ft._trampoline_hold.pdf
    • https://s3.amazonaws.com/ginutu/dosedonefuwoniwupebevi.pdf
    • http://dofiruser.epizy.com/gibuvilojojajaxi.pdf
    • http://nununad.myartsonline.com/zutiluzaje.pdf
    • http://tunarijog.rf.gd/61735694980.pdf
    • https://s3.amazonaws.com/liwafo/zte_valet_z665c.pdf
    • http://fopekexu.epizy.com/ranofolefidolilejulosab.pdf
    • http://vuruwabudakase.epizy.com/64469738449.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_off0000fd36.bin
a5629faafbff88c1b1f05e631522929687c5af0f67cacad6a6c95d7d35e16504		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 5836 bytes
font_01_sfnt_off00011121.bin
069f77d8bfd473c0b13df161f4a4f537d76d8acddf84ecf8842a58409c340f27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11121 11212 bytes

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