Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff5adf4681c2443…

MALICIOUS

PDF

88.7 KB Created: 2021-02-22 02:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6ebef7a6599ec8e677b86440a7b9fe08 SHA-1: ecfc8ec053b58cea7fc0245effa2fc82eaeaf954 SHA-256: eff5adf4681c24434fb776a93bc22c2bf6fc4e59a96c6ed32171fac3420214e4
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though partially corrupted, suggests a lure related to 'leadership sparknotes', aiming to trick users into clicking the malicious link.

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
  • 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/aws?utm_term=the+5+levels+of+leadership+sparknotes PDF link annotation
    • http://limecash.xyz/126691227357w464.pdfIn PDF document text
    • http://mini-cam2.club/fotapaxanojebigidizogok08bxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_5fe7514cded81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_5fd61ce0459e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456728/normal_601384cf759cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462368/normal_602e9cd856617.pdfIn PDF document text
    • http://wetepuzasuvuroz.22web.org/tetunax.pdfIn PDF document text
    • http://4gusevshop.space/nota_bimasakti_menari57ngu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380079/normal_600cbf180f479.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
    • https://s3.amazonaws.com/wunupalezozerud/hypertension_and_heart_failure_icd_10_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bunobowopelitafogapuxelit.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/govekemo.pdfIn PDF document text
    • http://nejovafejasujob.rf.gd/79566292493.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/rufos.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/91507738183.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/jedujavaderutofalazu.pdfIn PDF document text
    • http://zuxakenupe.epizy.com/22060410531.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/backup_apps_android_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/animasi_ppt_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/air_pollution_information_for_project_in_urdu.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_off000110db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DB 5112 bytes
SHA-256: 4236bbefcb0a08f0779eb458b7014f700192bb2c1d238a3f66193fe5eb2da7ce
font_01_sfnt_off00012244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12244 10876 bytes
SHA-256: b9ce5ae31e9b6f97ab72ce0330de127a19d23eeaf7ef0501f8d9f571d431ad1e
font_02_sfnt_off000146e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146E0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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