Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6c1887546e058d…

MALICIOUS

PDF

79.5 KB Created: 2021-02-18 07:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 00fea9d85de80171e0e684e31d89ae5e SHA-1: ae0d4a95987a0b942550872060802748eb0751ac SHA-256: 6d6c1887546e058d04ff331970c042bf2e63ce02a488691a9e62bbac9448e32f
136 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of invisible PDF links that redirect to CAPTCHA-themed lures suggests an attempt to deceive users into believing they are completing a security check, which likely leads to further malicious actions. The embedded URLs, such as http://pulawev.epizy.com/google_recaptcha_form_example.pdf, are key indicators of the redirection chain used in this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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://jottigo.ru/wix?keyword=lifeway+sunday+school+lessons+fairview+baptist+church PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457272/normal_5ff81b473073e.pdfIn PDF document text
    • http://dihtyar.online/south_african_house_music_2018_free23g6c.pdfIn PDF document text
    • http://lifokuvaxodime.iblogger.org/22918038309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370269/normal_5fedc3d42323a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_601594e2b644a.pdfIn PDF document text
    • http://abzac.me/gujoxkjcxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482206/normal_600496961738d.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/Wjhjdif/cho_sun_ok_restaurant_menu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402717/normal_5fc8c71bd9791.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375696/normal_5fef38e75539a.pdfIn PDF document text
    • http://douchelabs.xyz/boson_x_free_mac6zy4k.pdfIn PDF document text
    • http://wersita.space/nokodexajetuxoh.pdfIn PDF document text
    • https://cdn.sqhk.co/poxedomeke/gfdXheW/vubenuwab.pdfIn PDF document text
    • https://cdn.sqhk.co/wivenute/RyTibhg/28779551281.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482189/normal_5ff7cbd2cc845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_602738d0abe57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446635/normal_60005620ebb56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://bavidatesudujig.epizy.com/b1_free_archiver_pc.pdfIn PDF document text
    • http://pulawev.epizy.com/google_recaptcha_form_example.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/45273086815.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/xosatusilawo.pdfIn PDF document text
    • http://nupuzasig.epizy.com/basement_car_park_design_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/4._4_biomes_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/azure_storage_account_blob_arm_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 5460 bytes
SHA-256: 7764e622986e6b59b45d01017766ad207f7fae403516017373d483e42d055883
font_01_sfnt_off0000fc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7D 11080 bytes
SHA-256: 00128ed6d1ef891514ec2935a76efa850710ebf760c248377e7eda2e04648266
font_02_sfnt_off000121bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121BB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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