Malicious PDF — malware analysis report

Static analysis result for SHA-256 92348239831228e4…

MALICIOUS

PDF

80.7 KB Created: 2021-02-13 01:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3d4d72b6a0a36704d8dc75464ba87433 SHA-1: 487e2c9dcf94ab54e9633f1f0668181dd38362d6 SHA-256: 92348239831228e465c7457472aae1cc2201e0a6aade6526387a0bcdade352e8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of compromise, likely serving as a lure for a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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=free+animal+migration+worksheets In PDF document text
    • https://static.s123-cdn-static.com/uploads/4469103/normal_5feb3bf30654a.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/windows_7_32_bit_bluetooth_driver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5fdc24bddbd83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5ff611fc131b7.pdfIn PDF document text
    • https://cdn.sqhk.co/sibamoxa/Niinogi/at_t_mobile_security_vpn_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426955/normal_60054317c10f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418175/normal_5ffb18036b13b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_5fdb97223809b.pdfIn PDF document text
    • https://cdn.sqhk.co/vedasukuki/OghgijB/94115563231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420599/normal_5ffa1b1b2d759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448137/normal_6026fba92a18d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_5feb03aa7be04.pdfIn PDF document text
    • https://cdn.sqhk.co/luwosera/ihbT1sR/gejobudizalijodafosose.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383450/normal_5ff41f6c220ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxaxinum.epizy.com/7329933170.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/wallpaper_hd_for_jio_mobile_free.pdfIn PDF document text
    • http://diruxepuf.epizy.com/lufurukifevedibafajoru.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/luvipivutamu.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/toronto_fun_guide_swimming_north_york.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/telugu_movies_2018_3gp_hd.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 5208 bytes
SHA-256: f1ea5d29b0cfd5cc901d68df5c0f07d862943634c576f123241ebcb353f7f50b
font_01_sfnt_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 10504 bytes
SHA-256: c040165886eedbba2a717d0f48a3e2aba8b02c2050903b92ce06f6d365928929
font_02_sfnt_off00011fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD0 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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