Malicious PDF — malware analysis report

Static analysis result for SHA-256 301a746a2ccc64f6…

MALICIOUS

PDF

81.9 KB Created: 2021-02-20 09:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 3bc3673d18eb7a4a70ce9768f4959ccd SHA-1: c715e7a3af791406c99b7854e828b615af8fe5a6 SHA-256: 301a746a2ccc64f609c3f2ab9fcefb0585d1daa8f3c2d129876ae0bf7b8883c9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a notable heuristic identifying it as a link farm on disposable hosting, pointing to suspicious domains like 'site-shop.xyz'. The document body, though heavily obfuscated, suggests a lure related to 'peppered moth simulation answers key' to entice users to click on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=peppered+moth+simulation+answers+key PDF link annotation
    • http://site-shop.xyz/18538292466ipvrm.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/yghD369/38755080540.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/djgidnW/who_is_the_real_raymond_reddington_imposter.pdfIn PDF document text
    • https://segapokepex.weebly.com/uploads/1/3/4/6/134649200/fa56c.pdfIn PDF document text
    • https://wawenefawopi.weebly.com/uploads/1/3/4/4/134494228/f1aba19aa85.pdfIn PDF document text
    • http://socialwave.me/chemistry_lab_formal_report_examplexb1r4.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/k10ibgi/balloon_tower_defense_5_download.pdfIn PDF document text
    • http://easy-money-cash.space/javadidatolobijetabexapalnjvfr.pdfIn PDF document text
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/lolawafutofaraj.pdfIn PDF document text
    • https://zivozisexime.weebly.com/uploads/1/3/2/8/132814465/3149850.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/jfibhaQ/37392541047.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/zodererezuzuxi/tonojubafarafaluzulu.pdfIn PDF document text
    • http://daxevekiwenux.epizy.com/5785589050.pdfIn PDF document text
    • http://feselipalez.epizy.com/ecology_unit_vocabulary_answers.pdfIn PDF document text
    • http://fuwotatikiluwa.epizy.com/xiwelivufit.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/60366495206.pdfIn PDF document text
    • http://zubutavobidu.rf.gd/budovetowu.pdfIn PDF document text
    • http://gopikobupi.epizy.com/android_brave_browser_dark_mode.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/bula_buscopan_composto_injetavel.pdfIn PDF document text
    • http://gadusevi.rf.gd/bozosalazaz.pdfIn PDF document text
    • http://bakutogigu.rf.gd/tujuan_budaya_organisasi.pdfIn PDF document text
    • http://pasobopupolom.rf.gd/zesusowanewukir.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_off0001013e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 5456 bytes
SHA-256: 13c6bbb1e122f5de1770e4a4cfbd9db6a0c6da44df21a9f80dc3c21199eb7e8c
font_01_sfnt_off000113b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 11580 bytes
SHA-256: b9aedfcc2c5b0929ec0d0e365938e989905f23176c5557e3ed0d7a307a6b9558

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