Malicious PDF — malware analysis report

Static analysis result for SHA-256 4637f5f3bc778bca…

MALICIOUS

PDF

68.6 KB Created: 2021-02-25 00:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 57686e1c0e2b5fad9fb5e3196dcb65a3 SHA-1: 4d50101d1fbfe474ed97cc03ee2cfa89db27d250 SHA-256: 4637f5f3bc778bca005fb8bad929e34775ee8fd8967f119e3f78048716ca4bd4
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded links, with several pointing to known malicious redirectors or disposable hosting, suggesting an attempt to direct users to harmful sites. The document body, though partially corrupted, contains text related to 'potential energy on shelves gizmo answer key', likely a lure to entice users to click the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=potential+energy+on+shelves+gizmo+answer+key In PDF document text
    • http://lamaded.mywebcommunity.org/tixajutedogazevupuzenen.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/6th_grade_math_fun_worksheets.pdfIn PDF document text
    • http://pakamid.22web.org/macmillan_guide_to_science.pdfIn PDF document text
    • http://beliyden.xyz/zaxatuxarusijumilinuv83yi.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/hfVCNiQ/pvp_iv_calculator_shadow.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/jisgj0p/robumovavijuweradamuze.pdfIn PDF document text
    • http://storedubai.shop/fnaf_free_download_for_androidioyzz.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/how_to_turn_off_ice_maker_sub-zero_550.pdfIn PDF document text
    • http://mobeditobaxul.scienceontheweb.net/rajeb.pdfIn PDF document text
    • https://cdn.sqhk.co/goxufime/iaKNjhW/56339780409.pdfIn PDF document text
    • http://biwijenanun.22web.org/zuporax.pdfIn PDF document text
    • https://cdn.sqhk.co/toxinize/hijdjxU/81596864526.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/paxivogedewilu/how_is_a_waterspout_formed.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/is_the_snk_manga_finished.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/58974359523.pdfIn PDF document text
    • http://xokawetuvon.epizy.com/bafg_formblatt_3_zeile_12.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/50260945984.pdfIn PDF document text
    • http://didopip.epizy.com/acb_full_form_in_medical.pdfIn PDF document text
    • http://soxenaroguz.rf.gd/68214088160.pdfIn PDF document text
    • http://tukutuxobolekub.epizy.com/pizominubofilob.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_off0000cfb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB8 5468 bytes
SHA-256: 602b2389d50560ccdf4f2931fb486ec336814d5900759b9bdc240de9bdcaf868
font_01_sfnt_off0000e24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24E 10260 bytes
SHA-256: f16738e335cf85402a9277ebb6cb2420211d28cf029ffd53fed6591fed634d00

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