Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43df81f788612ae…

MALICIOUS

PDF

68.0 KB Created: 2021-05-19 03:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5286824a5073322f3de58cd29685fe3b SHA-1: d7a2cb4b128d7f68c9baa511e6e9781d7df44051 SHA-256: a43df81f788612ae10a8bfc810d11d52775caf6ef3207bc98873f2de4f7e8639
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=mitosis+and+meiosis+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383340/normal_5ff6ad09bc909.pdfIn PDF document text
    • https://tisawotaw.weebly.com/uploads/1/3/5/9/135993845/8552829.pdfIn PDF document text
    • http://sipebep.22web.org/emulator_for_android_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426830/normal_5fc5b2ccb2deb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461211/normal_600387a39b47e.pdfIn PDF document text
    • https://wazelekur.weebly.com/uploads/1/3/4/3/134322050/bigaranawurile_toxup_guvabikevi.pdfIn PDF document text
    • https://rupilobeva.weebly.com/uploads/1/3/0/7/130775598/9794110.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417138/normal_5ff110a484ca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469370/normal_6022fed60e9a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_6044752025076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390643/normal_60136edac8412.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/dezajok/awe_psx_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/62298574979.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/ladupusejigize.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/the_spectacular_now_netflix_country.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/95801712909.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/levadikal.pdfIn PDF document text
    • http://puxetedategekex.epizy.com/dunofom.pdfIn PDF document text
    • http://xupezewusipoja.rf.gd/prime_video_apk_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/60587205973.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_off0000cb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB32 5196 bytes
SHA-256: fd01e22711412b97c3921c694bad9de5ff5ba3ebcd8158689018ad3e471ba5e6
font_01_sfnt_off0000dcc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC9 10784 bytes
SHA-256: 1e19a0e80c09e2f9fe51b9c2f7516f7338a4daa1bfdc7bbe62f22c9456527834

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