Malicious PDF — malware analysis report

Static analysis result for SHA-256 7488ee21ac46b1bb…

MALICIOUS

PDF

72.7 KB Created: 2020-12-27 17:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: caf4bfb20e66e541b402a55430a819ed SHA-1: 789aaf3bb80b6d4d37fad337e0c2afde7c05e86a SHA-256: 7488ee21ac46b1bb34216c01091e44897ff196c9ca8e9934907a35442f3f672f
214 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically designed for credential phishing impersonating Gmail. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link to a Weebly-hosted PDF further supports the phishing lure, likely intended to capture user credentials.

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
  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://polerobozugewif.weebly.com/uploads/1/3/4/3/134344868/7476486084b3da.pdf.
  • 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://cctraff.ru/123?utm_term=google+account+manager+7.0+apkpure In PDF document text
    • https://polerobozugewif.weebly.com/uploads/1/3/4/3/134344868/7476486084b3da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393908/normal_5fcb99df39806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444636/normal_5fe0bc8550dad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494433/normal_5faed0fd0a78c.pdfIn PDF document text
    • https://kasukironumasex.weebly.com/uploads/1/3/1/4/131454791/63150a5d55f8ce1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_5fd8cdc15b205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379744/normal_5f9b602c15594.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402267/normal_5fd0b561deb01.pdfIn PDF document text
    • https://kizujaxaluw.weebly.com/uploads/1/3/4/3/134393650/6a9052.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/wepivugetoziduwovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409813/normal_5fa0f73fe76f4.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/nademopor/buzz_lightyear_to_the_rescue_game.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/hampton_bay_wood_burning_fire_pit.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/have_courage_and_be_kind_cinderella_book.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000ce94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE94 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 5424 bytes
SHA-256: 4dc7e52e9b73e329b405899f4dee55aa8f5e7dbfb673abbfb6fb724991856fd0
font_02_sfnt_off0000f1eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EB 10316 bytes
SHA-256: a0ff99dc25536d69e3cac1bf1833ae67b4a9462ac4bf85604359bbd5e63167a4

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