Malicious PDF — malware analysis report

Static analysis result for SHA-256 f37fff0fbee5fa7c…

MALICIOUS

PDF

81.5 KB Created: 2021-03-25 16:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc6b14f324824c970948b0f5a419eac5 SHA-1: 97ac41a3a6aa64ebe571fc7e5f9e58ea0ccf0390 SHA-256: f37fff0fbee5fa7cf993592cb6afc39997aa10e61ddef2f9cba851152efc2cf0
116 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The embedded URL `https://maypoin.ru/wix?keyword=apple+child+labor+solutions` is the primary indicator of malicious intent. While the document body is heavily obfuscated, the presence of external URIs and the overall detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://maypoin.ru/wix?keyword=apple+child+labor+solutions
    • https://cdn-cms.f-static.net/uploads/4457847/normal_6058746aa544e.pdf
    • https://static.s123-cdn-static.com/uploads/4496151/normal_5fc69005282e3.pdf
    • https://cdn-cms.f-static.net/uploads/4451950/normal_6015fcbe2339a.pdf
    • https://cdn.sqhk.co/rijomawonuj/jbmifHQ/volajigeratef.pdf
    • https://cdn-cms.f-static.net/uploads/4426686/normal_603ffa72e2a0e.pdf
    • https://cdn.sqhk.co/ributexovek/Dhjejgp/advance_auto_parts_near_me_open_now.pdf
    • https://cdn.sqhk.co/vixawutozama/ljbPih0/modern_carpet_design_ideas.pdf
    • https://cdn-cms.f-static.net/uploads/4403121/normal_6057c26ba1990.pdf
    • https://cdn-cms.f-static.net/uploads/4392237/normal_6032c9922a762.pdf
    • https://cdn-cms.f-static.net/uploads/4409239/normal_601f11beeee52.pdf
    • https://cdn.sqhk.co/dabebasavus/gjrnaha/dowuvoger.pdf
    • https://cdn-cms.f-static.net/uploads/4446035/normal_60209935c42c0.pdf
    • https://static.s123-cdn-static.com/uploads/4369486/normal_5fef530816f56.pdf
    • https://cdn.sqhk.co/vefoveted/aYicheM/child_vaccination_chart.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wapuzega.rf.gd/waste_management_notes.pdf
    • http://dosututoseres.rf.gd/invitation_templates_free_online_word.pdf
    • https://s3.amazonaws.com/mejigavukolu/15802491445.pdf
    • https://s3.amazonaws.com/patotale/build_a_fraction_wall_worksheet.pdf
    • http://renureva.epizy.com/21969047724.pdf
    • http://rufofexejojar.epizy.com/antimanicomial_reforma_psiquitrica.pdf
    • http://fibubaxuvuvixik.epizy.com/mosobiwiwe.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010315.bin
728b81e89b2cd55a7e0aae71c1b3b8177c8b385e4ca8e3c1bbee3e88e2777500
pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 5288 bytes
font_01_sfnt_off000114fd.bin
e5c8e2e0c18948c83eddca6331d82ebe31bc48a7460ae8dec8a5d1aa1574ed51
pdf-font-stream PDF embedded font (sfnt) at offset 0x114FD 10448 bytes