Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a5e1ea35676e29…

MALICIOUS

PDF

73.9 KB Created: 2021-03-03 20:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c13d3de029dac9fb75f33f69662fa0c4 SHA-1: 76a6397ee3236943dd9a5a71badf11b8c075ba16 SHA-256: 51a5e1ea35676e29923536b37096f1effd1eb7a7ed39f7ac68585c57455a559b
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'zajinet.ru', which is likely part of a phishing or credential harvesting scheme. The document body, though heavily obfuscated, suggests a lure related to 'Evelyn Wood Memory Dynamics reviews'. No scripts were extracted, but the presence of multiple suspicious URLs suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://zajinet.ru/award?keyword=evelyn+wood+memory+dynamics+reviews PDF link annotation
    • http://microbladingeyebrowsdallastx.com/70834209081glm7u.pdfIn PDF document text
    • http://closemaze.com/98983356581eek21.pdfIn PDF document text
    • http://card2card-perevod24.site/746356561758zbio.pdfIn PDF document text
    • http://medyahanem.com/lejobavudopa7nmbe.pdfIn PDF document text
    • http://faxusigeroles.sportsontheweb.net/dewalt_734_instruction_manual.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/tulilufewumagarapi.pdfIn PDF document text
    • http://50offshop.pro/pasifsl2cb.pdfIn PDF document text
    • http://legionmone.xyz/boating_test_manual0qaa2.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/k-edge_shimano_di2_junction_box_stem_mount.pdfIn PDF document text
    • http://jumofusifabezol.66ghz.com/98624991231.pdfIn PDF document text
    • http://simcars.ru/589732682312angq.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/hola_music_guitar_lessons353lc.pdfIn PDF document text
    • http://leyloften.online/325324999736n2ki.pdfIn PDF document text
    • http://torevifij.iblogger.org/ge_profile_microwave_touch_panel_not_working.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/blackjack_online_real_money_paypal.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/10416361970.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/37135241398.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/68180149540.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/futurerestore_guide_ios_12.pdfIn PDF document text
    • http://jokosen.atwebpages.com/how_much_is_tydus_talbott_worth.pdfIn PDF document text
    • http://kedogevakubonog.epizy.com/wuxetididesatogu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 5296 bytes
SHA-256: 328c84e7c0299234349dc9966b7ecab733fab3b3e95af2cbb4edb9f9ca8f3ec4
font_01_sfnt_off0000f81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 10080 bytes
SHA-256: 136ad4e9433191ad4ba20510051ed107be502975b60ebd78bbd98c78d8657535

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